JP5184282B2 - Core bit - Google Patents

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JP5184282B2
JP5184282B2 JP2008251034A JP2008251034A JP5184282B2 JP 5184282 B2 JP5184282 B2 JP 5184282B2 JP 2008251034 A JP2008251034 A JP 2008251034A JP 2008251034 A JP2008251034 A JP 2008251034A JP 5184282 B2 JP5184282 B2 JP 5184282B2
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core bit
groove
tube
screw
chips
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JP2010082812A (en
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達雄 三中
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株式会社コンセック
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Description

本発明は、コンクリート構造物に穴あけ加工するのに用いるコアドリル用のコアビットに関する。なお、本明細書でいうコンクリート構造物とは、鉄筋コンクリート構造物はもとよりのこと、コンクリート構造物以外の石造物や建築物の壁、床、天井等を構成するもの等を含むものとする。   The present invention relates to a core bit for a core drill used for drilling a concrete structure. In addition, the concrete structure referred to in this specification includes not only a reinforced concrete structure but also a stone structure other than a concrete structure, a structure of a wall, a floor, a ceiling, or the like of a building.

コアビットには、ワンボデー式コアビットと、主として長穴の穴あけ加工に使用される連結式コアビットとがある。図1は、前者のワンボデー式コアビットについて示すもので、薄肉鋼管製のボデー1の一端にダイヤモンドチップ2を周方向に適当間隔で溶接又はロー付けして固着し、他端にフランジ3を溶接にて固着したものである。   The core bit includes a one-body type core bit and a connected type core bit mainly used for drilling a long hole. FIG. 1 shows the former one-body type core bit. A diamond tip 2 is welded or brazed to an end of a thin steel pipe body 1 at an appropriate interval in the circumferential direction, and a flange 3 is welded to the other end. It is fixed.

図2は、後者の連結式コアビットを示すもので、薄肉鋼管製のボデーの一端にダイヤモンドチップ5を周方向に適当間隔で溶接又はロー付けして固着したコアビット6と、カップリング7と、コアビット6とカップリング7を連結するチューブ8よりなり、チューブ8を継ぎ足すことにより長く延ばすことができるようにしてあり、チューブ8を連結できるようにするために、コアビット6とチューブ8とカップリング7には連結部分にそれぞれネジが形成されている。図3には、一側外周面にネジ9を形成したコアビット6を示す。   FIG. 2 shows the latter connecting type core bit, which includes a core bit 6, a coupling 7, and a core bit in which a diamond tip 5 is fixed to one end of a thin steel pipe body by welding or brazing at an appropriate interval in the circumferential direction. 6 and the coupling 7 are connected to each other. The tube 8 can be extended for a long time by adding the tube 8, and the core bit 6, the tube 8, and the coupling 7 can be connected to each other. Are each formed with a screw at the connecting portion. FIG. 3 shows a core bit 6 in which a screw 9 is formed on one outer peripheral surface.

図4は、図1又は図2に示すコアビットを用いてコンクリート構造物よりなる被削材11に穴あけ加工中の断面を示すもので、図示するようにダイヤモンドチップ2、5は厚みがボデー1の肉厚よりも厚く、ボデー1の内外に突出しているため、切削溝13の溝幅はボデー1の厚みより大きくなる。そのためボデー1の内外周に隙間を生じ、この隙間によりボデー1は被削材11に接触しないようになっていると共に、冷却水やエアなどの冷却媒体が隙間に通され、冷却媒体で刃先を冷却したのち、切り粉を排出させるようにしている。図示する例では、冷却媒体はボデー内側と被削材11のコア12との間の隙間を通り、刃先を冷却したのち、切り粉を伴いボデー外側と被削材11との間の隙間を通って排出されるようになっているが、冷却をエアによって行う乾式の穴あけ加工においては、図5に示すように上記と逆にエアをボデー外側と被削材11との隙間を通し、刃先を冷却したのち、ボデー内側とコア12との間の隙間を通してコアドリルのシャフトから排出させるようにしたものもある。   FIG. 4 shows a cross section during drilling of a work material 11 made of a concrete structure using the core bit shown in FIG. 1 or FIG. 2, and the diamond tips 2 and 5 have a thickness of the body 1 as shown. Since it is thicker than the wall thickness and protrudes into and out of the body 1, the groove width of the cutting groove 13 is larger than the thickness of the body 1. For this reason, a gap is formed in the inner and outer circumferences of the body 1, so that the body 1 does not come into contact with the work material 11, and a cooling medium such as cooling water or air is passed through the gap, and the cutting edge is moved by the cooling medium. After cooling, the chips are discharged. In the illustrated example, the cooling medium passes through the gap between the inside of the body and the core 12 of the work material 11, cools the cutting edge, and then passes through the gap between the outside of the body and the work material 11 with cutting chips. However, in the dry drilling process in which cooling is performed by air, air is passed through the gap between the outside of the body and the work material 11 as shown in FIG. In some cases, after cooling, the material is discharged from the shaft of the core drill through the gap between the inside of the body and the core 12.

コアビットは使用に伴いダイヤモンドチップ2、5の磨耗が避けられず、側面での磨耗が進行すると、ダイヤモンドチップ2、5の突出量が少なくなり、ボデー内外での隙間が少なくなって、切り粉の排出が困難になる。とくにダイヤモンドチップ2、5の内外への突出量は外側より内側の方が少ないのが一般的であり、ボデー内外の隙間も内側の方が外側より小さくなるため、エアをボデー外側より内側に通す冷却方式ではとくに、図5に示すように、切り粉14(図5)がコアとボデー内側との隙間に溜まって詰まり易くなり、冷却が行えなくなったり、穴あけ加工ができなくなったりすることがある。   With the use of the core bit, the wear of the diamond tips 2 and 5 is inevitable, and when the wear on the side surface proceeds, the amount of protrusion of the diamond tips 2 and 5 decreases, the gap inside and outside the body decreases, Discharge becomes difficult. In particular, the amount of protrusion of the diamond chips 2 and 5 to the inside and outside is generally smaller on the inside than on the outside, and the gap inside and outside the body is smaller on the inside than on the outside, so air is passed inside the outside of the body. Particularly in the cooling method, as shown in FIG. 5, the chips 14 (FIG. 5) accumulate in the gap between the core and the inside of the body and become clogged easily, and cooling may not be performed or drilling may not be performed. .

切り粉の排出効果を高めるためにボデーの内外周面に螺旋状の突部を突設したものも知られる(特許文献1)。
特開平8−142039号
In order to enhance the chip discharging effect, there is also known one in which a spiral protrusion is provided on the inner and outer peripheral surfaces of the body (Patent Document 1).
JP-A-8-142039

特許文献1に開示されるものにおいてもダイヤモンドチップの側面が磨耗し(ダイヤモンドチップが磨耗すると、螺旋状の突部も当然に磨耗する)、ボデー内外の前述する隙間が小さくなると、切り粉の排出が困難となることに変わりがない。   Even in the one disclosed in Patent Document 1, the side surface of the diamond tip is worn (when the diamond tip is worn, the spiral protrusion naturally wears), and when the above-mentioned gap inside and outside the body becomes small, the discharge of chips Will remain difficult.

本発明は、ダイヤモンドチップの側面が磨耗しても切り粉の排出がスムースに行え、切り粉の詰まりによる穴あけ加工ができなくなる、といった不具合を解消することができるコアビットを提供することを目的とする。   An object of the present invention is to provide a core bit that can smoothly discharge chips even when the side surface of a diamond tip is worn and can eliminate problems such as the inability to drill holes due to clogging of chips. .

請求項1に係わる発明は、円筒状のボデーと、該ボデー先端に固着されるダイヤモンドチップを有し、単独で、或いはチューブを接続した状態でコンクリート構造物への穴あけ加工を行うコアビットにおいて、前記コアビットのボデーとチューブにはそれぞれ前記切り粉排出用の溝が形成されると共に、コアビットとチューブが捩込みによって連結され、捩込みのためコアビットのボデーとチューブにそれぞれ形成されるネジは、一方のネジが他方のネジより長く、長いネジはその一部がコアビットとチューブを連結した状態、或いはチューブ同士を連結した状態で、内周側又は外周側に露出し、該露出部分と前記切り粉排出用の溝が接続されることを特徴とし、
請求項2に係わる発明は、請求項1に係わる発明の切り粉排出用の溝がダイヤモンドチップ間のボデー先端よりボデーに形成されることを特徴とする。
The invention according to claim 1 is a core bit having a cylindrical body and a diamond tip fixed to the tip of the body, and performing a drilling process on a concrete structure alone or with a tube connected thereto. The core bit body and the tube are each formed with a groove for discharging the chips, and the core bit and the tube are connected by screwing, and the screw formed on the core bit body and the tube for screwing is one of the screws. The screw is longer than the other screw, and a long screw is exposed on the inner or outer peripheral side in a state where a part of the core bit is connected to the tube, or the tubes are connected to each other. It is characterized in that a groove for
The invention according to claim 2 is characterized in that the chip discharging groove of the invention according to claim 1 is formed in the body from the tip of the body between the diamond chips.

請求項に係わる発明は、請求項1又は2に係わる発明の切り粉排出用の溝が軸心方向に沿って形成されることを特徴とする。
The invention according to claim 3 is characterized in that the chip discharge groove of the invention according to claim 1 or 2 is formed along the axial direction.

請求項1に係わる発明によると、ダイヤモンドチップの側面の磨耗によりボデー又はチューブと被削材との間の隙間が小さく、或いは殆どなくなって切り粉が詰まるようなことがあっても溝が切り粉や冷却媒体の排出路としての機能を果し、穴あけ加工を引続き続行することができる。また、コアビットとチューブを捩じ込みによって連結したとき、コアビットのボデーに形成される溝とチューブに形成される溝が一致していないと、切り粉の排出ができないか或いは困難になるが、チューブに形成される溝を露出したネジに接続させることにより、切り粉はネジを通ってチューブ側の溝に確実に排出されるようになる。
According to the first aspect of the present invention, even if the gap between the body or the tube and the work material is small or almost lost due to wear on the side surface of the diamond tip, the groove is cut off. It can function as a cooling medium discharge path and continue drilling. In addition, when the core bit and the tube are connected by screwing, if the groove formed in the core bit body and the groove formed in the tube do not match, it will be difficult or impossible to discharge the chips. By connecting the groove formed to the exposed screw, the chips are surely discharged through the screw to the groove on the tube side.

請求項2に係わる発明によると、ダイヤモンドチップが溝からの切り粉の排出を妨げることがない。   According to the invention of claim 2, the diamond tip does not hinder the discharge of chips from the groove.

請求項1に係わる発明の溝は螺旋溝であってもよいが、請求項に係わる発明のようにコアビットの軸心方向に形成される溝にすると、溝の加工が容易であり、かつ切り粉がスムースに排出されるようになる。 The groove of the invention according to claim 1 may be a spiral groove. However, when the groove is formed in the axial direction of the core bit as in the invention according to claim 3 , the groove is easily processed and cut. The powder is discharged smoothly.

以下、本発明の実施形態のコアビットについて図面により説明する。
図7〜図10は、連結式コアビットのコアビット21と、該コアビット21に連結されるチューブ31について示すもので、図7はコアビット21の断面図、図8は同コアビットの側面図、図9はチューブ31の断面図、図10は図9のAーA線における断面図である。
Hereinafter, a core bit according to an embodiment of the present invention will be described with reference to the drawings.
FIGS. 7 to 10 show the core bit 21 of the connecting core bit and the tube 31 connected to the core bit 21, FIG. 7 is a sectional view of the core bit 21, FIG. 8 is a side view of the core bit, and FIG. FIG. 10 is a cross-sectional view taken along line AA in FIG.

コアビット21は、図2に示す従来のコアビットと同様、薄肉鋼管製のボデーの一端にダイヤモンドチップ22を周方向に適当間隔で溶接又はロー付けして取付けると共に、他側の外周面に外ネジ23を形成したもので、内周面にはダイヤモンドチップ間のボデー先端より軸心方向に沿ってボデー他端に達する溝24がダイヤモンドチップ間ごとに形成されている。   Similarly to the conventional core bit shown in FIG. 2, the core bit 21 is attached to one end of a thin steel pipe body by welding or brazing the diamond tip 22 at an appropriate interval in the circumferential direction, and an external screw 23 on the other outer peripheral surface. In the inner peripheral surface, a groove 24 reaching the other end of the body along the axial direction from the front end of the body between the diamond chips is formed for each space between the diamond chips.

チューブ31は薄肉鋼管製のボデーの一側内周面にコアビット21の外ネジ23に捩込まれる内ネジ32が形成されると共に、ボデーの他側外周面に別のチューブ又は図2に示すカップリング7に捩込まれる外ネジ33が形成されている。そしてチューブ内周面には、内ネジ32に隣接して周溝34が形成されると共に、一端が周溝34に接続され、他端がチューブ端に達する軸心方向に沿う溝35が周方向に適当間隔で多数形成されている。この溝35は、コアビット21に形成される溝24や周溝34と好ましくは同じ深さに形成されるが、必ずしも同じ深さでなくてもよい。また溝35の溝幅や溝の数、周方向の形成位置は溝24と対応して一致していなくてもよい。   The tube 31 is formed with an inner screw 32 to be screwed into the outer screw 23 of the core bit 21 on one inner peripheral surface of the thin steel pipe body, and another tube or cup shown in FIG. 2 on the other outer peripheral surface of the body. An external screw 33 to be screwed into the ring 7 is formed. On the inner peripheral surface of the tube, a circumferential groove 34 is formed adjacent to the inner screw 32, one end is connected to the circumferential groove 34, and a groove 35 along the axial direction in which the other end reaches the tube end is circumferential. Are formed at appropriate intervals. The groove 35 is preferably formed to the same depth as the groove 24 and the circumferential groove 34 formed in the core bit 21, but does not necessarily have the same depth. Further, the groove width, the number of grooves, and the formation position in the circumferential direction of the groove 35 do not have to coincide with the groove 24.

使用時においては、コアビット21とチューブ31を捩込みによって連結し、必要によっては更にチューブ31を継ぎ足し、図2に示すカップリング7に捩込みによって連結する。コアビット21のネジ23をチューブ31の32に捩込んでコアビット21とチューブ31を連結した状態でコアビット21の溝24はチューブ31の周溝34に接続され、これによりコアビット21の溝24とチューブ31の溝35が周溝34を介して接続されるようになる。   In use, the core bit 21 and the tube 31 are connected by screwing, and if necessary, the tube 31 is further added and connected to the coupling 7 shown in FIG. 2 by screwing. The groove 24 of the core bit 21 is connected to the circumferential groove 34 of the tube 31 in a state where the screw 23 of the core bit 21 is screwed into the tube 32 of the tube 31 and the core bit 21 and the tube 31 are connected, whereby the groove 24 of the core bit 21 and the tube 31 are connected. The groove 35 is connected via the circumferential groove 34.

本実施形態の連結式コアビットによると、ダイヤモンドチップ22の側面の磨耗によりコアビット21及びチューブ31と被削材との間の隙間がなくなるか、殆どなくなっても溝24及び35と周溝34とにより切り粉の排出路が確保され、溝24、35より切り粉が排出されるようになって穴あけ加工を続行させることができること、図4に示す被削材のコア12に付着する切り粉は、溝24、35のエッジで掻き取られ、コア12との間に切り粉が詰まりにくいこと、溝24はダイヤモンドチップ間に形成されるため、ダイヤモンドチップ22が切り粉の排出を妨げることがないこと、溝24及び35は、周溝34に接続されることにより溝24と溝35の溝幅や周方向の形成位置更には数が異なっていても接続することができるうえ、軸心方向に沿って真直ぐに形成されるため、溝24及び35の加工が容易にできること、周溝34を溝24及び35と同一深さに形成することにより切り粉の排出がスムースに行えるようになること、溝24、35が軸心方向に沿って真直ぐに形成されることによってまた、切り粉の排出もスムースに行えること、周溝34はネジ32に隣接しており、周溝34の加工をネジ加工に続いて効率よく行うことができること等の効果を有する。   According to the coupled core bit of this embodiment, the gaps between the core bit 21 and the tube 31 and the work material disappear due to wear on the side surface of the diamond tip 22 or are almost eliminated by the grooves 24 and 35 and the circumferential groove 34. The chip discharge path is secured, the chip can be discharged from the grooves 24 and 35, and the drilling process can be continued. The chip attached to the core 12 of the work material shown in FIG. It is scraped off at the edges of the grooves 24 and 35, so that chips are not easily clogged with the core 12, and since the grooves 24 are formed between the diamond chips, the diamond chips 22 do not hinder the discharge of the chips. In addition, the grooves 24 and 35 can be connected to the circumferential groove 34 even if the groove 24 and the groove 35 are formed in different widths, circumferential positions, or different numbers. Since it is formed straight along the center direction, the grooves 24 and 35 can be easily processed, and the peripheral groove 34 can be formed at the same depth as the grooves 24 and 35 so that chips can be discharged smoothly. That is, the grooves 24 and 35 are formed straight along the axial direction, and the chips can be discharged smoothly. The circumferential groove 34 is adjacent to the screw 32, and the circumferential groove 34 is processed. Can be efficiently performed following the screw machining.

前記実施形態では、コアビット21の溝24とチューブ31の溝35を周溝34を介して接続しているが、別の実施形態では、コアビット21のボデーに形成される外ネジ23を短く形成すると共に、チューブ31に形成される内ネジ32を長く、かつ溝35に接続して形成し、コアビット21とチューブ31の両者を捩込みによって連結したとき、内ネジ32の一部が内周側に露出し、切削時の切り粉がコアビット21の溝24よりネジ32の露出部分を通ってチューブ31の溝35に排出させるようにする。   In the above embodiment, the groove 24 of the core bit 21 and the groove 35 of the tube 31 are connected via the circumferential groove 34. However, in another embodiment, the external screw 23 formed on the body of the core bit 21 is formed short. At the same time, when the inner screw 32 formed on the tube 31 is formed to be long and connected to the groove 35 and both the core bit 21 and the tube 31 are coupled by screwing, a part of the inner screw 32 is located on the inner peripheral side. The exposed chips are cut out from the groove 24 of the core bit 21 through the exposed portion of the screw 32 and discharged into the groove 35 of the tube 31.

前記実施形態ではまた、コアビット21のボデーに溝24が形成されているが、別の実施系体では、チューブにのみ溝35が形成され、コアビット21のボデーには、溝24が形成されない。コアビット21は一般にチューブ31より短く、コアビット21に溝が形成されていなくても切り粉はコアビット21と被削材11との間を通り、チューブ31に形成される溝35からスムースに排出されることが可能であるため、コアビット21での切り粉の詰まりを生じにくい。
前記実施形態では更にまた、溝24と35では、いずれもコアビット21とチューブ31の内周面に形成されているが、外周面に形成してもよいし、内外の両周面に共に形成してもよい。
In the above embodiment, the groove 24 is formed in the body of the core bit 21. However, in another embodiment, the groove 35 is formed only in the tube, and the groove 24 is not formed in the body of the core bit 21. The core bit 21 is generally shorter than the tube 31, and even if no groove is formed in the core bit 21, the chips pass between the core bit 21 and the work material 11 and are smoothly discharged from the groove 35 formed in the tube 31. Therefore, clogging of chips at the core bit 21 is difficult to occur.
Further, in the embodiment, the grooves 24 and 35 are both formed on the inner peripheral surface of the core bit 21 and the tube 31, but may be formed on the outer peripheral surface, or may be formed on both the inner and outer peripheral surfaces. May be.

前記実施形態は、連結式コアビットについて示すものであるが、図1に示すワンボデー式コアビットについても内外周面に前記溝24を形成することにより、前記と同様の効果を生じさせることができる。   Although the said embodiment shows about a connection-type core bit, the effect similar to the above can be produced also about the one-body type core bit shown in FIG. 1 by forming the said groove | channel 24 in an inner peripheral surface.

ワンボデー式コアビットの斜視図。The perspective view of a one-body type core bit. 連結式コアビットの斜視図。The perspective view of a connection type | formula core bit. 連結式コアビットに用いられるコアビットの正面図。The front view of the core bit used for a connection-type core bit. 穴あけ加工中の断面図。Sectional drawing in process of drilling. 冷却媒体がコアビット外周から内周に流れる冷却方式において、コアビット内周に切り粉が詰まった状態を示す断面図。Sectional drawing which shows the state with which the core bit inner periphery got clogged in the cooling system with which a cooling medium flows from an outer periphery to an inner periphery. ダイヤモンドチップの側面が磨耗してコアとの間の隙間がなくなった状態を示す断面図。Sectional drawing which shows the state from which the side surface of a diamond tip was worn out and the clearance gap between cores was lost. 本発明に係わるコアビットの断面図。Sectional drawing of the core bit concerning this invention. 同コアビットの側面図。The side view of the core bit. コアビットに接続されるチューブの断面図。Sectional drawing of the tube connected to a core bit. 図9のA−A線断面図。FIG. 10 is a cross-sectional view taken along line AA in FIG. 9.

符号の説明Explanation of symbols

21・・コアビット
22・・ダイヤモンドチップ
23、32、33・・ネジ
24、35・・溝
31・・チューブ
34・・周溝
21 ·· Core bit 22 · · Diamond tips 23, 32 and 33 · · Screws 24 and 35 · · Groove 31 · · Tube 34 · · Circumferential groove

Claims (3)

円筒状のボデーと、該ボデー先端に固着されるダイヤモンドチップを有し、単独で、或いはチューブを接続した状態でコンクリート構造物への穴あけ加工を行うコアビットにおいて、前記コアビットのボデーとチューブにはそれぞれ前記切り粉排出用の溝が形成されると共に、コアビットとチューブが捩込みによって連結され、捩込みのためコアビットのボデーとチューブにそれぞれ形成されるネジは、一方のネジが他方のネジより長く、長いネジはその一部がコアビットとチューブを連結した状態、或いはチューブ同士を連結した状態で、内周側又は外周側に露出し、該露出部分と前記切り粉排出用の溝が接続されることを特徴とするコアビット。 In a core bit having a cylindrical body and a diamond tip fixed to the tip of the body and drilling a concrete structure alone or in a state where the tube is connected, the body and the tube of the core bit are respectively The groove for discharging chips is formed, the core bit and the tube are connected by screwing, and the screw formed on the body and tube of the core bit for screwing is one screw longer than the other screw, The long screw is partly connected to the core bit and the tube, or in a state where the tubes are connected to each other, and is exposed to the inner peripheral side or the outer peripheral side, and the exposed portion is connected to the chip discharging groove. Core bit featuring. 前記切り粉排出用の溝はダイヤモンドチップ間のボデー先端よりボデーに形成されることを特徴とする請求項1記載のコアビット。   2. The core bit according to claim 1, wherein the chip discharging groove is formed in a body from a body tip between diamond chips. 前記切り粉排出用の溝が軸心方向に沿って形成されることを特徴とする請求項1又は2記載のコアビット。
The core bit according to claim 1 or 2, wherein the chip discharging groove is formed along an axial direction.
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RU2743415C1 (en) * 2020-06-03 2021-02-18 Сергей Сергеевич Моисеев Layered material for production of food shells

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CN102843958A (en) 2010-03-31 2012-12-26 佳能株式会社 Tomographic imaging method and control device of tomographic imaging device
CN102380760B (en) * 2011-09-23 2013-09-04 杭州钻虎金刚石工具有限公司 Processing method for engineering diamond core drill matrix
JP6769718B2 (en) * 2016-03-09 2020-10-14 株式会社大林組 Core bit and drilling device
KR200493817Y1 (en) * 2020-01-09 2021-06-08 이경이 Core Drill Bit

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JP2005199405A (en) * 2004-01-16 2005-07-28 Kunio Okada Core bit for core drill
JP2008178961A (en) * 2007-01-26 2008-08-07 Ting Fong Electric & Machinery Co Ltd Manufacturing method of drill bit and its structure

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2743415C1 (en) * 2020-06-03 2021-02-18 Сергей Сергеевич Моисеев Layered material for production of food shells

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