WO2020072936A1 - Aquaculture net cleaning system - Google Patents
Aquaculture net cleaning systemInfo
- Publication number
- WO2020072936A1 WO2020072936A1 PCT/US2019/054748 US2019054748W WO2020072936A1 WO 2020072936 A1 WO2020072936 A1 WO 2020072936A1 US 2019054748 W US2019054748 W US 2019054748W WO 2020072936 A1 WO2020072936 A1 WO 2020072936A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- aquaculture net
- cleaning system
- knuckle
- net cleaning
- angle
- Prior art date
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 52
- 238000009360 aquaculture Methods 0.000 title claims abstract description 36
- 244000144974 aquaculture Species 0.000 title claims abstract description 36
- 238000011084 recovery Methods 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims description 2
- 244000062645 predators Species 0.000 description 14
- 230000008878 coupling Effects 0.000 description 11
- 238000010168 coupling process Methods 0.000 description 11
- 238000005859 coupling reaction Methods 0.000 description 11
- 238000013461 design Methods 0.000 description 9
- 241000251468 Actinopterygii Species 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000005755 formation reaction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000002441 reversible effect Effects 0.000 description 4
- 230000001154 acute effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000009372 pisciculture Methods 0.000 description 3
- 241001465754 Metazoa Species 0.000 description 2
- 241000283203 Otariidae Species 0.000 description 2
- 229920006311 Urethane elastomer Polymers 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000003373 anti-fouling effect Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 241000512259 Ascophyllum nodosum Species 0.000 description 1
- 241000538562 Banjos Species 0.000 description 1
- 241000251730 Chondrichthyes Species 0.000 description 1
- 241000238586 Cirripedia Species 0.000 description 1
- 229920004943 Delrin® Polymers 0.000 description 1
- 241000282320 Panthera leo Species 0.000 description 1
- 241000283216 Phocidae Species 0.000 description 1
- 241001674048 Phthiraptera Species 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000004599 antimicrobial Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 244000045947 parasite Species 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/02—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by distortion, beating, or vibration of the surface to be cleaned
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/10—Cleaning bottoms or walls of ponds or receptacles
Definitions
- This invention is related to the field of open ocean aquaculture and, in particular, to aquaculture net cleaning knuckles .
- Ocean fish farms are often placed in areas with predators like sharks, sea lions and seals. Not all locations have predator problems. In these areas a predator net is commonly used to keep predators at a distance of at least 1 to 2 meters away from grow out nets.
- the nets that need to be cleaned are deployed vertically below the floating rim with weighs attached at the lowest vertical point of the net, and a bottom net attached horizontally to the vertically net
- the predator nets are weighted to oppose water currents and predator attacks . For instance, seals and sea lions will swim into predator nets and push the net to the grow out net and bite a fish if the predator net is not tight enough or if the animal is powerful enough.
- Predator nets usually have a mesh of about 3 to 4 inch square holes sufficient to prevent predators from entering the fish farm.
- Grow out nets have much smaller mesh and may have square or hexagonal openings of 1 ⁇ 2 to 1 3 ⁇ 4" across.
- When net systems are weighted the strands of the predator nets are much higher due to the fewer strands to support the weight and commonly have larger weights to repel the animals.
- the present invention will clean both grow out nets and predator nets, but predator nets can have the additional problems of structures including hard floats, frames, anchor chains, net weights and hard debris.
- Lindgren WO 2016/183274A1 discloses a net cleaning system designed to clean grow out nets including elastomeric fingers and knuckles turning on the perimeter of propellers.
- the system works well on grow out nets including knuckles where the net weight is supported by more strands.
- For predator nets with larger mesh higher strand tension requires higher cleaning energy and spike loading from tighter nets, and impact on cage structures is not acceptable for net life or the equipment and special designs are required.
- the increased loads also reduce the speed of the equipment and therefore slower cleaning. Elimination of Spike loads allows for more aggressive cleaning while protecting the net and equipment.
- Peak loads can be reduced in the current invention in two ways. With knuckle designs that are suitable for the nets and tension applied. And with the use of specialty designed flexible drive coupling.
- the spike rotational loads are designed using urethane rubber or other elastomeric couplings between the first driven hub.
- the current requirement needs a coupling to take both rotational and perpendicular spikes in a small envelope of the propeller mounting hub.
- the elastomeric hub is designed to absorb rotational impact as well as allow movement perpendicular to the net or obstruction.
- the hub has special requirements because of the applied torque of 50 to 100 ft. lbs. applied and peak loads from impact many times larger, and the small envelope available for placement.
- Obstructions can be anchor chains, parts of the floating frame of the cage or weighting at the lower edge of the net.
- Suitable elastomers from 70 to 85 A shore have been tested successfully with inner diameter of inches and outer diameter of 5.5 inches and flexible element thickness of .1 at the O.D. to 1 1/4 inch at the
- the concave surface in the flexible element configured to allow additional flexibility parallel to the axis when the propeller hits obstructions.
- a concave radius of .312 inches formed at a 4.25 inch diameter from each side providing flexibility parallel to the axis.
- the torque suitability and perpendicular flex is also affected by the choice of hardness or durometer and adjustment of the dimensions described.
- An apparatus for cleaning nets underwater comprising at least one propeller housing with a centrally disposed axis with a plurality of blades extending therefrom.
- An outer perimeter ring secured to an outer tip of each blade with a plurality of knuckles secured to the outer perimeter ring.
- Each knuckle including a surface constructed and arranged to be forcefully presented to the aquaculture net upon rotation of said blades for removal of growth by impact friction and shaking of the aquaculture net and water flow.
- the cleaning head is positioned against the surface of an underwater net wherein the cleaning features are constructed and arranged to remove soft and hard growth from the nets.
- the knuckles have angles measured from tangent to a curved surface and a line perpendicular to its base with changes from above 20 degrees to over 45 degrees.
- the curved surface approximates a radius of over 2 inches and less than 7 inches .
- An objective of the invention is to provide cleaning knuckles having an improved efficiency and rotational speeds for better cleaning of a net.
- Still another objective of the invention is to provide improved knuckles that allows for the development of smaller lighter systems with improved cleaning.
- Another objective of the invention is to teach a knuckle curved surface that can be calculated by a cosine angle parallel to a net face and a sine angle perpendicular to the net face.
- Yet still another objective of the invention is to provide a net cleaning device that includes options to maximize performace based on net mesh size and the type of fouling .
- Still another objective of the invention is to provide an aquaculture net cleaning system wherein knuckles are not symmetrical .
- Yet another objective of the invention is to provide flexible and changeable coupling that will reduce spike loads in both the rotational and paralled to the axis direction extending the life of equipment allowing lighter more efficient operation.
- Figure 1 is a perspective view of the aquaculture net cleaning system propeller housing with knuckles secure to a perimeter ring;
- Figure 2 is an enlarged view of a portion of
- Figure 3 is a front plane view of a first embodiment knuckle
- Figure 4 is a perspective view of Figure 3;
- Figure 5 is a front plane view of a second embodiment knuckle
- Figure 6 is a perspective view of Figure 5;
- Figure 7 is a front plane view of a third embodiment knuckle
- Figure 8 is a perspective view of Figure 7;
- Figure 9 is a front plane view of a fourth embodiment knuckle
- Figure 10 is a perspective view of Figure 9;
- Figure 11 is an end view of Figure 9;
- Figure 12 is a front plane view of a fifth embodiment ;
- Figure 13 is perspective view of 12;
- Figure 14 is exploded view of the elastomeric hub ;
- Figure 15 is a cut away view of the elastomeric hub.
- FIGS. 1 and 2 depict an aquaculture net cleaning system technology comprising a propeller housing with a centrally disposed elastomeric hub 12 with a plurality of blades 14 extending from the elastomeric hub 12 to an outer tip 16 of each blade.
- An outer perimeter ring 18 is secured to the outer tip 16 of each blade 14.
- a knuckle 20 is secured to the outer perimeter ring 18.
- Each knuckle 20 includes a curved surface 22 constructed and arranged to be forcefully presented to the aquaculture net upon rotation of the blade 14 for removal of growth by impact and shaking of the aquaculture net .
- Lower tensioned net loads with the described technology is analogous to a base guitar where strings move easily and far when compared to standard guitar or banjo where movement is very low with the same force and movement is far less.
- the knuckle design of the instant invention is designed to play the standard guitar versus the base guitar.
- the cleaning of nets with the new knuckle design results from impacting hard growth by cleaning knuckles, friction on net twine and aggressive shaking of the net to remove soft growth.
- the energy required to do this without net damage is a function of the net or twine tension and the angle of the moving knuckle, the speed and the distance pushed .
- the Lindgren disclosure WO 2016/183274 A1 works well with low tension nets. However, with high tension large mesh nets the net is much more difficult to shake and move distant from normal positions.
- the forces are a geometric function being the sine or cosine of the angle of the knuckle to compare the forces paralleled to the face of the net versus perpendicular to the face of the net.
- To reduce the force on the net and torque requirement of the equipment and clean well requires a curved surface to change the angle as the net is moved to keep the forces more constant than can be achieved with a straight surface.
- Figures 3 and 4 depict a preferred knuckle 20 having a curved surface 22 on a leading edge and compound angle trailing edge 24. Apertures 26 and 28 allow for receipt of fasteners 30 and 32. The centerline 34 is illustrated as about .375" from the center of the apertures 26, 28.
- the knuckle 20 is more net friendly, reduces power requirement and improves equipment life.
- This knuckle 40 embodiment having a length of about 2.086". The design is symmetrical to operate in clockwise or counterclockwise direction and can be reversed if worn.
- Figures 5 and 6 depict a knuckle 40 having a symmetrical edge surfaces 42, 44 with a centerline 46 illustrated as about .375" from the center of the apertures 48, 50.
- This knuckle 40 embodiment having a length of about 1.802.
- Figures 7 and 8 depict a knuckle 60 having non symmetrical edge surfaces 62 and 64. Edge surface 62 having an angle of about 25 degrees, rear edge surface 64 having a compound angle slightly more than 65 degrees.
- Figures 9-11 depict a knuckle 70 having symmetrical edge surfaces 72, 74 of about 60 degrees. The length is about
- Figures 12 and 13 depict a knuckle 80 with a rapidly sloping curved edge 82 and rearward curved edge 84. This embodiment provides faster net strand return that can improve cleaning on very tight nets at the expense of an efficient reverse that is can be used to move more easily or untangle kelp, ropes and other fouling.
- Table 2 Shown in Table 2 is how dramatically the forces parallel and perpendicular the net change as the knuckle moves on the net strand.
- the curved angle knuckle can provide high forces to move the aquaculture net parallel to the net face and then shift to high push perpendicular to the net for maximum movement with less torque. This is not possible with a single angle.
- the existing designs were symmetrical commonly with an acute angle to centerline of approxinlately 30 degrees. Because of the low angle on the downstream side recovery of the twine is fast and also shakes off fouling. With the advance invention of the curved knuckle the downstream side can have inhibited return recovery at low rotational speeds causing less cleaning power of the twine not quickly returning to position rapidly.
- the solution is a more acute or straight angle on the downstream side.
- the propellers are run in reverse to untangle or reposition the cleaning head. The downstream angle must not be so acute to prevent reverse rotation of above below 20 degrees. When in reverse the propellers quickly move the cleaning head off the net and only a small angle is required.
- the current invention increases efficiency and rotational speeds for better cleaning.
- the elastomeric hub 12 which forms a flexible drive coupling to facilitate the use of the knuckles.
- the elastomeric hub operates as a shock absorber to lessen impact damage to the knuckles when removing aged barnacles or other hard growth that would otherwise case spike loads.
- the elastomeric hub 12 consists of a driver 84 having a plurality of splined shaped formations 86, 88 positioned around the diameter of the driver 84 on each side of a centrally disposed guide wall 90.
- the driver 84 is formed from a rigid material such as aluminum, delrin or the like.
- a elastomeric body 92 is over molded to the driver 84 wherein the splined shaped formations 86, 88 maintain the elastomeric body 92 from rotating separately from the driver 84.
- the guide wall 90 which extends outwardly from the splined formations 86, 88 prevents the elastomeric body 92 from detaching from the driver 84.
- the elastomeric body 92 is a urethane elastomer.
- the elastomeric hub 92 is constructed and arranged to prevent spike loads in a rotational direction and parallel to the rotational axis of the propeller simultaneously.
- the elastomeric body 92 forms a flexible element preferably with a durometer between 70 and 90 A shore hardness, the I.D. and O.D. of the flexible element and mating surface are splined.
- a base 100 of the hub 12 has an inner surface 104 having concave sockets 106 for receipt of the valleys 98 and peaks 99 of the elastomeric body 92.
- the outer shell preferably constructed from aluminum for support of the blades 14 and outer perimeter ring 18.
- a coupling ring 108 secures the driver 84 within the base 100, the coupling ring 108 may be secured along a groove 110 formed along an edge of the base 100.
- a protective shield 112 is securable to the base 100 having a lip 114 for securement along edge 116 of the base.
- Coupled is defined as connected, although not necessarily directly, and not necessarily mechanically.
- the use of the word “a” or “an” when used in conjunction with the term “comprising” in the claims and/or the specification may mean “one, “ but it is also consistent with the meaning of "one or more” or “at least one.”
- the term “about” means, in general, the stated value plus or minus 5%.
- the use of the term “or” in the claims is used to mean “and/or” unless explicitly indicated to refer to alternatives only or the alternative are mutually exclusive, although the disclosure supports a definition that refers to only alternatives and "and/or.”
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Marine Sciences & Fisheries (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Farming Of Fish And Shellfish (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2019355082A AU2019355082A1 (en) | 2018-10-04 | 2019-10-04 | Aquaculture net cleaning system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16/151,369 | 2018-10-04 | ||
US16/151,369 US11116188B2 (en) | 2015-05-12 | 2018-10-04 | Aquaculture net cleaning system |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2020072936A1 true WO2020072936A1 (en) | 2020-04-09 |
Family
ID=68345036
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2019/054748 WO2020072936A1 (en) | 2018-10-04 | 2019-10-04 | Aquaculture net cleaning system |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU2019355082A1 (en) |
CL (1) | CL2021000829A1 (en) |
WO (1) | WO2020072936A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115382818B (en) * | 2022-08-23 | 2023-05-30 | 临沂农业科技职业学院(筹) | Fixed planting plate cleaning equipment for water planting of facility ecological agriculture |
Citations (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3628489A (en) | 1969-11-10 | 1971-12-21 | Global Marine Inc | Hull-cleaning brush |
US4084535A (en) | 1976-03-01 | 1978-04-18 | Institute For Industrial Research And Standards | Apparatus for cleaning submerged surfaces |
US4252081A (en) | 1979-02-16 | 1981-02-24 | Marine Aquaculture (Scotland) Limited | Fish cage and method of cleaning fish cage |
JPS5662188U (en) * | 1979-10-18 | 1981-05-26 | ||
US4493125A (en) | 1980-08-05 | 1985-01-15 | Collis George C | Toothbrush with curved bristles |
EP0131987A1 (en) * | 1983-07-04 | 1985-01-23 | Boud Van Rompay | Apparatus for use by a diver to brush or scrape the walls of structures lying underwater |
US4566855A (en) * | 1981-08-28 | 1986-01-28 | Costabile John J | Shock absorbing clutch assembly for marine propeller |
US4838193A (en) | 1986-12-23 | 1989-06-13 | Tak Josephus A M V D | Scrubbing machine |
US4970747A (en) | 1989-05-09 | 1990-11-20 | Joseph Pastore | Trash rack cleaning apparatus |
JPH08228614A (en) | 1995-02-24 | 1996-09-10 | Ringyo Kikaika Kyokai | Auxiliary clamping apparatus |
JPH099818A (en) | 1995-06-28 | 1997-01-14 | Mitsubishi Heavy Ind Ltd | Closely contacting self-propelled cleaning apparatus for fishing net |
JPH0944238A (en) | 1995-07-31 | 1997-02-14 | Mitsubishi Heavy Ind Ltd | Automatic travel control system for underwater cleaning device |
JPH1035587A (en) | 1996-07-26 | 1998-02-10 | Mitsubishi Heavy Ind Ltd | Underwater robot |
US6070547A (en) | 1997-05-16 | 2000-06-06 | Seaward Marine Services, Inc. | Surface cleaning device and related method |
US20090173677A1 (en) * | 2007-05-11 | 2009-07-09 | Seura Rodrigo Andres Geraldo | Integral submarine maintenance system that operates by means of a simultaneous removing, vacuuming and filtering effect, generated by a removing device connected to a vacuum device, said vacuum device being connected to a storage and filtering device, said system being used to clean organic pollution that adheres to the substrate of submerged culture systems and/or structures and/or ships and/or equipment both in marine and in fresh water |
WO2013126359A2 (en) * | 2012-02-24 | 2013-08-29 | Lindgren Peter B | Aquaculture cage screen and cleaning apparatus |
US8635730B2 (en) | 2008-10-10 | 2014-01-28 | Mic Pty Ltd | In situ sub marine net cleaning and inspecting device |
WO2016183274A1 (en) | 2015-05-12 | 2016-11-17 | Lindgren Peter B | Submerged net cleaner |
-
2019
- 2019-10-04 WO PCT/US2019/054748 patent/WO2020072936A1/en active Application Filing
- 2019-10-04 AU AU2019355082A patent/AU2019355082A1/en active Pending
-
2021
- 2021-04-01 CL CL2021000829A patent/CL2021000829A1/en unknown
Patent Citations (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3628489A (en) | 1969-11-10 | 1971-12-21 | Global Marine Inc | Hull-cleaning brush |
US4084535A (en) | 1976-03-01 | 1978-04-18 | Institute For Industrial Research And Standards | Apparatus for cleaning submerged surfaces |
US4252081A (en) | 1979-02-16 | 1981-02-24 | Marine Aquaculture (Scotland) Limited | Fish cage and method of cleaning fish cage |
JPS5662188U (en) * | 1979-10-18 | 1981-05-26 | ||
US4493125A (en) | 1980-08-05 | 1985-01-15 | Collis George C | Toothbrush with curved bristles |
US4566855A (en) * | 1981-08-28 | 1986-01-28 | Costabile John J | Shock absorbing clutch assembly for marine propeller |
EP0131987A1 (en) * | 1983-07-04 | 1985-01-23 | Boud Van Rompay | Apparatus for use by a diver to brush or scrape the walls of structures lying underwater |
US4838193A (en) | 1986-12-23 | 1989-06-13 | Tak Josephus A M V D | Scrubbing machine |
US4970747A (en) | 1989-05-09 | 1990-11-20 | Joseph Pastore | Trash rack cleaning apparatus |
JPH08228614A (en) | 1995-02-24 | 1996-09-10 | Ringyo Kikaika Kyokai | Auxiliary clamping apparatus |
JPH099818A (en) | 1995-06-28 | 1997-01-14 | Mitsubishi Heavy Ind Ltd | Closely contacting self-propelled cleaning apparatus for fishing net |
JPH0944238A (en) | 1995-07-31 | 1997-02-14 | Mitsubishi Heavy Ind Ltd | Automatic travel control system for underwater cleaning device |
JPH1035587A (en) | 1996-07-26 | 1998-02-10 | Mitsubishi Heavy Ind Ltd | Underwater robot |
US6070547A (en) | 1997-05-16 | 2000-06-06 | Seaward Marine Services, Inc. | Surface cleaning device and related method |
US20090173677A1 (en) * | 2007-05-11 | 2009-07-09 | Seura Rodrigo Andres Geraldo | Integral submarine maintenance system that operates by means of a simultaneous removing, vacuuming and filtering effect, generated by a removing device connected to a vacuum device, said vacuum device being connected to a storage and filtering device, said system being used to clean organic pollution that adheres to the substrate of submerged culture systems and/or structures and/or ships and/or equipment both in marine and in fresh water |
US8635730B2 (en) | 2008-10-10 | 2014-01-28 | Mic Pty Ltd | In situ sub marine net cleaning and inspecting device |
WO2013126359A2 (en) * | 2012-02-24 | 2013-08-29 | Lindgren Peter B | Aquaculture cage screen and cleaning apparatus |
WO2016183274A1 (en) | 2015-05-12 | 2016-11-17 | Lindgren Peter B | Submerged net cleaner |
Also Published As
Publication number | Publication date |
---|---|
AU2019355082A1 (en) | 2021-05-06 |
CL2021000829A1 (en) | 2022-04-08 |
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