CN106418166A - Unfermented quickly-unfrozen small steamed buns and preparation method - Google Patents

Unfermented quickly-unfrozen small steamed buns and preparation method Download PDF

Info

Publication number
CN106418166A
CN106418166A CN201611085187.5A CN201611085187A CN106418166A CN 106418166 A CN106418166 A CN 106418166A CN 201611085187 A CN201611085187 A CN 201611085187A CN 106418166 A CN106418166 A CN 106418166A
Authority
CN
China
Prior art keywords
dough
freezing
azymic
small steamed
steamed bun
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201611085187.5A
Other languages
Chinese (zh)
Other versions
CN106418166B (en
Inventor
王学东
胡先勤
王洋洋
周建军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan Polytechnic University
Original Assignee
Wuhan Polytechnic University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuhan Polytechnic University filed Critical Wuhan Polytechnic University
Priority to CN201611085187.5A priority Critical patent/CN106418166B/en
Publication of CN106418166A publication Critical patent/CN106418166A/en
Application granted granted Critical
Publication of CN106418166B publication Critical patent/CN106418166B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23VINDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
    • A23V2002/00Food compositions, function of food ingredients or processes for food or foodstuffs
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23VINDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
    • A23V2400/00Lactic or propionic acid bacteria
    • A23V2400/11Lactobacillus
    • A23V2400/169Plantarum

Landscapes

  • Confectionery (AREA)
  • Bakery Products And Manufacturing Methods Therefor (AREA)

Abstract

The invention discloses unfermented quickly-unfrozen small steamed buns and a preparation method. The unfermented quickly-unfrozen small steamed buns are made from dry yeast, probio-plus lactobacillus plantarum, rum koji, white granulated sugar, aluminum-free baking powder, trehalose, proline, glycerine, sodium stearoyl lactylate and water. The preparation method comprises the following steps of (1) mixing and stirring raw materials: activating the yeast with the water in a certain proportion, adding ingredients into a stirring vat, and performing stirring; (2) performing cutting into blocks, and performing shaping: firstly pressing dough, then cutting the pressed dough, and then performing shaping; (3) performing quick freezing: putting shaped dough into a freezing-refrigerating cabinet for quick-freezing; (4) performing frozen storage: putting the frozen dough into a freezer for frozen storage; (5) performing microwave unfreezing: putting the dough after the frozen storage into a microwave oven, performing unfreezing, and taking out the unfrozen dough for steaming; and (6) performing steaming: putting the unfrozen dough into a steamer, and performing steaming with cold water. According to the unfermented quickly-unfrozen small steamed buns and the preparation method thereof disclosed by the invention, the making time is greatly shortened, and the made steam buns are smooth in crusts, uniform and milky in color, tiny and uniform in internal air holes and delicious in mouth feel, and have wheat fragrance.

Description

A kind of azymic speed defrosting small steamed bun and preparation method
Technical field
The invention belongs to food processing technology field, it is more particularly to a kind of azymic speed defrosting small steamed bun, also relates to simultaneously And a kind of preparation method of azymic speed defrosting small steamed bun.
Background technology
A kind of existing Application No. CN 1017441181A is entitled《A kind of pre-fermented frozen dough steamed bread and its producer Method》Disclose a kind of production method of pre-fermented frozen dough steamed bread, comprise the following steps:1) dispensing is added water the face of stirring into Group;2) piecemeal, molding;3) pre fermentation;4) quick-freezing;5) cold storage;6) steam.Dispensing in step one has flour 62-65 part, the Yanshan Mountain Yeast 0.5-0.8 part, aluminum-free baking powder 0.6-0.9 part, white sugar 0.5-0.8 part, shortening 0.2-0.5 part, salt 0.1-0.3 Part, T-5398 0.06-0.09 part, Digestive Enzyme 0.05-0.08 part, xylanase 0.05-0.08 part, glucoseoxidase 0.05-0.08 part, trehalose 0.08-0.12 part, ascorbic acid 0.05-0.08 part, lecithin 0.08-0.12 part, sucrose ester 0.24-0.36 part, glycerol 0.10-0.15 part, locust bean gum 0.04-0.06 part, artemisia glue 0.04-0.06 part, carboxymethyl cellulose Plain 0.04-0.06 part, guar gum 0.04-0.06 part, gluten meal 0.54-0.80 part, wheaten starch or corn starch or Ma Ling Sweet potato starch or rice starch:0.54-0.80 part, water 30-32 part, above-mentioned material is mixed together stirring;In step 2, dough is divided It is slit into 70-80g/ block, pre fermentation time 12-15 minute in step 3, pre fermentation temperature 30-38 DEG C, pre fermentation humidity 60- 80%;- 35~-30 DEG C of quick freezing temperature in step 4, quick-freezing time 30-35 minute;In step 5, storage temperature is -16~-19 ℃;Steaming time 12-18 minute in step 6.Steamed bread (steamed bun) uniform color of this invention making, smooth surface, mouthfeel are fluffy And there is elasticity, its shortcoming has been by pre fermentation, increased injury during quick-freezing for the dough, so the technology of the present invention is also Have much room for improvement.
Also a kind of patent of invention number is had to be that CN101773227A is entitled《A kind of frozen dough steamed bread and its production method》 Disclose a kind of production method of frozen dough steamed bread, comprise the following steps:1) by dispensing mix and blend;2) piecemeal, molding;3) Quick-freezing;4) cold storage;5) ferment;6) steam.Dispensing in step one has flour 62-65 part, Yanshan Mountain yeast 0.5-0.8 part, aluminum-free Baking powder 0.6-0.9 part, white sugar 0.5-0.8 part, shortening 0.2-0.5 part, salt 0.1-0.3 part, T-5398 0.06- 0.09 part, Digestive Enzyme 0.05-0.08 part, xylanase 0.05-0.08 part, glucoseoxidase 0.05-0.08 part, trehalose 0.08-0.12 part, ascorbic acid 0.05-0.08 part, lecithin 0.08-0.12 part, sucrose ester 0.24-0.36 part, glycerol 0.10- 0.15 part, locust bean gum 0.04-0.06 part, artemisia glue 0.04-0.06 part, methylcellulose 0.04-0.06 part, guar gum 0.04-0.06 part, gluten meal 0.54-0.80 part, wheaten starch or corn starch or potato starch or rice starch 0.54- 0.80 part, water 30-32 part, put into mix and blend in a mixing bowl;It is divided into 70-80g/ block in step 2;Quick-freezing temperature in step 3 Spend for -35~-30 DEG C, 30~35 minutes quick-freezing time;- 16~-19 DEG C of storage temperature in step 4;Fermentation temperature in step 5 38-42 DEG C, fermentation time 70-90 minute, fermentation humidity is 80-90%;In step 6, steaming time is 12-18 minute.This Steamed bread (steamed bun) product color of bright making uniformly, smooth surface, mouthfeel is fluffy and has elasticity, but shortcoming is to need after quick-freezing Fermentation, causes Production Time to increase.So the technology of the present invention could be improved.
Content of the invention
For the deficiencies in the prior art, the purpose of the present invention is to there are provided a kind of azymic speed little steamed bun of defrosting Head, the steamed bread epidermis greatly reducing Production Time and making is smooth, uniform color is creamy white, and internal porosity is tiny, all Even, mouthfeel is tasty and refreshing and has wheat fragrance.
Another object of the present invention is to there are provided a kind of preparation method of azymic speed defrosting small steamed bun, and method is easy OK, easy and simple to handle, with existing be combined with household appliances, safety and sanitation and be easy to industrialized production.
In order to realize above-mentioned purpose, the present invention adopts following technical measures:
Its technology design is:First load weighted flour, Angel activity be that dry yeast, beneficial bacteria add Lactobacillus plantarum, sweet Distillers yeast, white sugar, aluminum-free baking powder, trehalose, proline, glycerol, sodium stearoyl lactate, put in a mixing bowl and stir, Add water stirring to form dough, take out pressure surface, piecemeal, molding after forming dough, carry out quick-freezing, cold storage is standby, microwave thawing After steam as finished product.
A kind of azymic speed defrosting small steamed bun, it is made up of the weight portion of following raw material:
A kind of azymic speed defrosting small steamed bun, it makes (preferred scope) by the weight portion of following raw material:
A kind of azymic speed defrosting small steamed bun, it makes (preferable scope) by the weight portion of following raw material:
A kind of azymic speed defrosting small steamed bun, it makes (best scope) by the weight portion of following raw material:
A kind of azymic speed defrosting small steamed bun, it makes (optimal occurrence) by the weight portion of following raw material:
A kind of preparation method of azymic speed defrosting small steamed bun, its step is:
(1) by raw material mix and blend:A certain proportion of gluten flour, Angel high activity is taken to be that dry yeast, beneficial bacteria add plant Thing lactobacilluss, koji, white sugar, aluminum-free baking powder, trehalose, proline, glycerol, sodium stearoyl lactate, water, use 15--20 The water of part carries out to yeast activating 10-15min, and in activation, water temperature should reach 30---35 DEG C.Dispensing is added in a mixing bowl, The low rate mixing 30-60 second, then the yeast mixture of activation, Lactobacillus plantarum, koji, water are added in dough mixing machine, first stir at a slow speed Mix 4-6min, rotating speed is 100-120r/min, more quickly stir 5-8min, rotating speed is 200-230r/min.Stirring completes When, make dough central temperature be 25-30 DEG C.
(2) piecemeal, integer:The dough being stirred first is carried out pressure surface 8-10 time, then be divided into 40-60g/ part whole Type.
(3) quick freezing:The good dough of integer is put in -30~-35 DEG C of freezing and refrigeration refrigerator-freezers and carries out quick-freezing 25- 30min, makes dough central temperature reach -18 DEG C~-22 DEG C.
(4) cold storage:The group of freezing is put in -18 DEG C~-20 DEG C of refrigerator-freezer, is stored.
(5) microwave thawing:Need the used time, dough is being put in microwave oven, be set to defrosting shelves, after defrosting 2-4min, will Dough steams on taking out.
(6) steam:Dough after thawing is put in steamer, cold water steams, steams 20-30min.It is finished product.
Instant invention overcomes the making that causes after the problem that reduces of the quality of the pre fermentation product that quick-freezing causes again and quick-freezing The problem that time increases, retains the uniform color of steamed bread product, compared with traditional steamed bread manufacturing process, time-consuming greatly reduce and The steamed bread epidermis producing is smooth, uniform color is creamy white, and internal porosity is tiny, and uniformly, mouthfeel is tasty and refreshing and has wheat fragrance.
The present invention compared with prior art, has advantages below and beneficial effect:
Instant invention overcomes the problem that reduces of the quality of the pre fermentation product that quick-freezing causes again and quick-freezing after fermentation cause The problem that Production Time increases, retains the uniform color of steamed bread product, compared with traditional steamed bread manufacturing process, takes and significantly subtracts Less and produce steamed bread epidermis is smooth, uniform color is creamy white, internal porosity is tiny, and uniformly, mouthfeel is tasty and refreshing and has Mai Xiang Taste.Specifically have following some:
1. do not need to ferment, shortened the Production Time of steamed bread, compared with the method for traditional fabrication steamed bread, save about The steamed bread fermentation time of 60min, is on the one hand beneficial to the industrialized production of dough, so that consumer only need to be thawed and steam, another Aspect avoids the growth of some pathogen in sweat, is allowed to health, health;
2. utilize mixed culture fermentation agent, make steamed bread produce the flavor substance that shows unique characteristics and good in taste;
3. the present invention is combined with existing household appliances, be allowed to convenient, fast, simple;
4. compared with prior art, the present invention is simpler, only needs solution to freeze steaming, operability is higher after freezing;
5. the technology steamed is adopted on cold water, the mouthfeel of steamed bread can be made more soft;
6. process is simple, cheap.
Brief description
Fig. 1 is a kind of preparation method flow diagram of azymic speed defrosting small steamed bun.
Wherein:1- supplementary material is weighed, 2- stirs, 3- adds water stirring agglomerating, 4- piecemeal, integer, 5- quick-freezing, 6- cold storage, 7- microwave thawing, 8- steam, 9- finished product.
Specific embodiment
Below in conjunction with concrete drawings and Examples, the invention will be further described.
Embodiment 1:
A kind of azymic speed defrosting small steamed bun, it is made up of the weight portion of following raw material:
A kind of preparation method of azymic speed defrosting small steamed bun, its step is:
(1) supplementary material is taken to weigh 1 and by uniform for raw material stirring 2:A certain proportion of gluten flour, Angel high activity is taken to send out Dry yeast, beneficial bacteria add Lactobacillus plantarum, koji, white sugar, aluminum-free baking powder, trehalose, proline, glycerol, stearoyl breast Sour sodium, water;Add water stirring agglomerating 3:Yeast is carried out activate 10 or 12 or 14 or 15min with 15 or 17 or 18 or 20 parts of water, In activation, water temperature should reach 30 or 32 or 35 DEG C.Dispensing is added in a mixing bowl, low rate mixing 30 or 40 or 50 or 60 seconds, so Afterwards the yeast mixture of activation, Lactobacillus plantarum, koji, water are added in dough mixing machine, first low rate mixing 4 or 5 or 6min, rotating speed is 100 or 110 or 120r/min, more quickly stir 5 or 6 or 7 or 8min, rotating speed is 200 or 210 or 220 or 230r/min.Stirring When completing, dough central temperature is made to be 25 or 27 or 28 or 30 DEG C.
(2) piecemeal, integer 4:The dough being stirred first is carried out pressure surface 8 or 9 or 10 times, then is divided into 40 or 50 or 60g/ Part integer.
(3) quick-freezing 5:Quick freezing:The good dough of integer is put into -30 or -32 or -34 or -35 DEG C of freezing and refrigeration refrigerator-freezers In carry out quick-freezing 25 or 27 or 29 or 30min, make dough central temperature reach -18 DEG C or -19 or -21 or -22 DEG C.
(4) cold storage 6:The group of freezing is put in -18 DEG C or -19 or -20 DEG C of refrigerator-freezer, is stored.
(5) microwave thawing 7:Need the used time, dough is being put in microwave oven, be set to defrosting shelves, defrosting 2 or 3 or 4min Afterwards, dough is taken out steaming.
(6) 8 are steamed:Dough after thawing is put in steamer, cold water steams, steams 20 or 23 or 25 or 27 or 30min, Obtain small steamed bun (finished product 9).
The steamed bread that this example produces, from the time only needing to 29min of thawing to finally steaming, was made with traditional steamed bread Journey is compared, and the time-consuming steamed bread epidermis greatly reducing and producing is smooth, uniform color is creamy white, and internal porosity is tiny, uniform, mouth Sense is tasty and refreshing and has wheat fragrance.
A kind of azymic speed defrosting small steamed bun, it is made up of the weight portion of following raw material:
Preparation process is same as Example 1.
The steamed bread that above example produces, from thaw to finally steaming only need to 22-29min time (any one when Between section), compared with traditional steamed bread manufacturing process, the time-consuming steamed bread epidermis greatly reducing production is smooth, uniform color is in breast White, internal porosity is tiny, and uniformly, mouthfeel is tasty and refreshing and has wheat fragrance.

Claims (7)

1. a kind of azymic speed defrosting small steamed bun, it is made up of the weight portion of following raw material:
2. a kind of azymic speed defrosting small steamed bun according to claim 1 it is characterised in that:
3. a kind of azymic speed defrosting small steamed bun according to claim 1 it is characterised in that:
4. a kind of azymic speed defrosting small steamed bun according to claim 1 it is characterised in that:
5. a kind of azymic speed defrosting small steamed bun according to claim 1 it is characterised in that:
6. a kind of azymic speed defrosting small steamed bun according to claim 1 it is characterised in that:
7. the preparation method of a kind of azymic speed defrosting small steamed bun described in claim 1, its step is:
(1) by raw material mix and blend:Take a certain proportion of gluten flour, dry yeast, beneficial bacteria add Lactobacillus plantarum, koji, White sugar, aluminum-free baking powder, trehalose, proline, glycerol, sodium stearoyl lactate, water, are carried out to yeast with the water of 15--20 part Activation 10-15min, in activation, water temperature reaches 30---35 DEG C, dispensing is added in a mixing bowl, stirs the 30-60 second, will activate Yeast mixture, Lactobacillus plantarum, koji, water add dough mixing machine in, stir 4-6min, rotating speed be 100-120r/min, then Stirring 5-8min, rotating speed is 200-230r/min, and stirring completes, and makes dough central temperature be 25-30 DEG C;
(2) piecemeal, integer:The dough being stirred first is carried out pressure surface 8-10 time, then be divided into 40-60g/ part integer;
(3) quick freezing:The good dough of integer is put in -30~-35 DEG C of freezing and refrigeration refrigerator-freezers and carries out quick-freezing 25-30min, Dough central temperature is made to reach -18 DEG C~-22 DEG C;
(4) cold storage:The group of freezing is put in -18 DEG C~-20 DEG C of refrigerator-freezer, is stored;
(5) microwave thawing:Dough is put in microwave oven, is set to defrosting shelves, after defrosting 2-4min, dough is taken out steaming;
(6) steam:Dough after thawing is put in steamer, cold water steams, steams 20-30min, as finished product.
CN201611085187.5A 2016-11-30 2016-11-30 A kind of azymic speed defrosting small steamed bun and preparation method Active CN106418166B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201611085187.5A CN106418166B (en) 2016-11-30 2016-11-30 A kind of azymic speed defrosting small steamed bun and preparation method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201611085187.5A CN106418166B (en) 2016-11-30 2016-11-30 A kind of azymic speed defrosting small steamed bun and preparation method

Publications (2)

Publication Number Publication Date
CN106418166A true CN106418166A (en) 2017-02-22
CN106418166B CN106418166B (en) 2019-08-06

Family

ID=58224215

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201611085187.5A Active CN106418166B (en) 2016-11-30 2016-11-30 A kind of azymic speed defrosting small steamed bun and preparation method

Country Status (1)

Country Link
CN (1) CN106418166B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109673944A (en) * 2019-01-08 2019-04-26 贵州盛茂白芨开发有限公司 A kind of production method of alkali-free macaroni
CN110959804A (en) * 2019-12-24 2020-04-07 上海爱一特餐饮有限公司 Steamed twisted roll and its making method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101731497A (en) * 2010-01-18 2010-06-16 黄卫宁 Quick-frozen steamed bread and preparation method thereof
CN101744181A (en) * 2010-01-18 2010-06-23 黄卫宁 Pre-fermented frozen dough steamed bread and production method thereof
CN102899275A (en) * 2012-11-02 2013-01-30 黑龙江省麒麟工贸公司 Method for preparing directed vat starter for making steamed breads
CN104366198A (en) * 2014-10-09 2015-02-25 江苏尚香食品有限公司 Manufacturing method of quick-frozen steamed stuffed bun blank
CN104543732A (en) * 2014-04-24 2015-04-29 吕文杰 Quick-frozen leaven-dough steamed stuffed bun and preparation method thereof
CN104996898A (en) * 2015-08-05 2015-10-28 张璟 Making method of raw frozen steamed buns

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101731497A (en) * 2010-01-18 2010-06-16 黄卫宁 Quick-frozen steamed bread and preparation method thereof
CN101744181A (en) * 2010-01-18 2010-06-23 黄卫宁 Pre-fermented frozen dough steamed bread and production method thereof
CN102899275A (en) * 2012-11-02 2013-01-30 黑龙江省麒麟工贸公司 Method for preparing directed vat starter for making steamed breads
CN104543732A (en) * 2014-04-24 2015-04-29 吕文杰 Quick-frozen leaven-dough steamed stuffed bun and preparation method thereof
CN104366198A (en) * 2014-10-09 2015-02-25 江苏尚香食品有限公司 Manufacturing method of quick-frozen steamed stuffed bun blank
CN104996898A (en) * 2015-08-05 2015-10-28 张璟 Making method of raw frozen steamed buns

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
吕莹果 等: ""植物乳酸菌发酵馒头工艺及性质研究"", 《粮食与油脂》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109673944A (en) * 2019-01-08 2019-04-26 贵州盛茂白芨开发有限公司 A kind of production method of alkali-free macaroni
CN110959804A (en) * 2019-12-24 2020-04-07 上海爱一特餐饮有限公司 Steamed twisted roll and its making method

Also Published As

Publication number Publication date
CN106418166B (en) 2019-08-06

Similar Documents

Publication Publication Date Title
CN101744181B (en) Pre-fermented frozen dough steamed bread and production method thereof
CN101731497B (en) Quick-frozen steamed bread and preparation method thereof
CN104186603A (en) Soft portable nutritious rice bread and production method thereof
CN104770428A (en) Preparation method of bran bread
CN102232504B (en) Steamed bread with Tibetan mushroom fermented milk as leaven and preparation method thereof
CN113632921B (en) Pre-fermented quick-frozen green embryo and preparation method thereof
CN101791087A (en) Pre-fermented quickly-frozen steamed bun and production method thereof
CN113229305A (en) Method for making crispy-taste miniature milk crusty pancake
CN101731519B (en) Quick-frozen steamed bread with vegetable stuffing and preparation method thereof
CN111642539A (en) Frozen leavened dough containing citrus fiber and preparation method and application thereof
KR20230022442A (en) Pre-steamed quick-frozen semi-finished semi-finished dumplings and their manufacturing method and application
CN104982787A (en) Flour special for quick-frozen dumpling wrappers and preparing method of flour
CN101773224A (en) Raw frozen bread product and production method thereof
CN101984832B (en) Baked steamed bread and manufacturing method thereof
CN106418166B (en) A kind of azymic speed defrosting small steamed bun and preparation method
CN101361499B (en) Frozen green dough for Chinese style wheaten food, production method thereof and method for producing wheaten food
CN105613666A (en) Key preparation method of mochi sandwich matcha whole-wheat cheese bread
CN114073262B (en) Quick-frozen steamed stuffed bun capable of maintaining quality and preventing deformation and preparation method thereof
CN105249188A (en) High-fiber frozen steamed bun for improving anti-freezing stability by means of lipase and transglutaminase and production method of high-fiber frozen steamed bun
CN111513250A (en) Pre-fermented frozen green steamed stuffed bun and preparation method thereof
CN110089539A (en) A kind of lime-preserved egg taste soda cracker and preparation method thereof
CN101731498A (en) Frozen dough cut steamed bun and production method thereof
CN101755867B (en) Quickly frozen steamed bun raw product and production method thereof
JPH06506349A (en) Method for producing yeast cookies and a stretched yeast batter therefor
CN108719955B (en) Frozen steamed stuffed bun green embryo modifying agent

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
CB03 Change of inventor or designer information
CB03 Change of inventor or designer information

Inventor after: Wang Xuedong

Inventor after: Hu Xianqin

Inventor after: Wang Yangyang

Inventor after: Zhou Jianjun

Inventor after: Lv Qingyun

Inventor before: Wang Xuedong

Inventor before: Hu Xianqin

Inventor before: Wang Yangyang

Inventor before: Zhou Jianjun

GR01 Patent grant
GR01 Patent grant