KR20120101933A - Oil coating apparatus for press - Google Patents

Oil coating apparatus for press Download PDF

Info

Publication number
KR20120101933A
KR20120101933A KR1020110020072A KR20110020072A KR20120101933A KR 20120101933 A KR20120101933 A KR 20120101933A KR 1020110020072 A KR1020110020072 A KR 1020110020072A KR 20110020072 A KR20110020072 A KR 20110020072A KR 20120101933 A KR20120101933 A KR 20120101933A
Authority
KR
South Korea
Prior art keywords
oil
roller
oil supply
rollers
pillars
Prior art date
Application number
KR1020110020072A
Other languages
Korean (ko)
Inventor
신형운
Original Assignee
신형운
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 신형운 filed Critical 신형운
Priority to KR1020110020072A priority Critical patent/KR20120101933A/en
Publication of KR20120101933A publication Critical patent/KR20120101933A/en

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B15/00Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0088Lubricating means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05CAPPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05CAPPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/08Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
    • B05C9/10Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation being performed before the application
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/10Arrangements for cooling or lubricating tools or work
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S100/00Presses

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Coating Apparatus (AREA)

Abstract

PURPOSE: An oil distributor for a press is provided to be stably installed, to easily adjust the installation position, and to adjust the vertical height of a housing by fastening and releasing a clamping bolt. CONSTITUTION: An oil distributor for a press comprises a base frame(1), two pillars(21,22), upper oiling rollers(31), lower oiling rollers(32), and an oil supplying device(4). The height of the upper and lower oiling rollers are easily adjusted, and said rollers are installed on the two pillars. The oil supplying device is installed on the upper and lower oiling rollers. The upper and lower oiling rollers comprise housings which are respectively joined to the pillars. A fixing magnet(11) and a hoisting bolt(12) are fixed in the lower part of the base frame. The housing comprises a clamping bolt(7) for fixing the housing to the pillars.

Description

프레스기용 오일 도포기{Oil coating apparatus for press}Oil coating apparatus for press machine

본 발명은 평판을 프레스 가공하는 공정에서 가공되는 평판에 오일을 도포하는 장치에 관한 것이다.
The present invention relates to an apparatus for applying oil to a plate to be processed in the step of pressing the plate.

평판을 프레스 가공함에 있어서는 가공 용이성을 위하여 평판의 내외 표면에 오일을 도포하게 된다. 이와 같은 프레스기의 오일 도포 장치는, 일본 공개특허공고 H05-3177770으로 제공 된 바와 같이, 흔히, 상하로 설치된 오일링 롤러와 상하의 오일링 롤러에 오일을 공급하는 오일공급 장치로 구성되어 오일링 롤러 사이로 프레싱 소재인 평판을 통과시키어 평판에 오일링을 한 후 프레스기에 공급하게 된다.In press working the flat plate, oil is applied to the inside and outside surfaces of the flat plate for ease of processing. The oil coating device of such a press machine is often composed of oil supply rollers for supplying oil to the oil ring rollers installed above and below and oil ring rollers above and below, as provided in Japanese Laid-Open Patent Publication H05-3177770. After passing through the plate, which is a pressing material, oil is applied to the plate and then supplied to the press.

그런데, 프레스기에 설치되어 평판을 가공하는 가공금형은 그 높이가 일정하지 않아 공급되는 평판의 높이가 일정하지 않게 된다. 그리하여 종래에는 오일 도포기를 프레스 금형으로부터 멀리 떨어지게 설치하여 높이 차를 가공되는 평판의 굴신으로 수용하게 하거나, 오일 도포기의 저부에 고임을 설치하여 도포기의 높이를 금형의 높이에 맞추어 사용하여 왔다. 오일 도포기의 설치 장소를 이동한다거나 그 설치 높이를 고임으로 조절하는 일은 불편하기도 하려니와 오일 도포기의 설치 상태를 불안정하게 하여 프레스 공정이 불안하게되며 그리하여 작업 능률을 저해하는 결점이 있다.By the way, the processing mold installed in the press machine for processing the flat plate is not constant in height, the height of the flat plate supplied is not constant. Thus, conventionally, the oil applicator has been installed away from the press mold to accommodate the height difference by the flexion of the plate to be processed, or by installing a spool at the bottom of the oil applicator, the height of the applicator has been used to match the height of the mold. Moving the place of installation of the oil applicator or adjusting the height of the installation is inconvenient, but unstable installation of the oil applicator makes the press process unstable and thus impairs the work efficiency.

이에 본 발명은 오일 도포기의 오일링 롤러의 설치 높이를 용이하게 조절할 수 있게 하며, 나아가 오일 도포기의 설치를 안정되게 하면서도 설치 위치를 용이하게 변경할 수 있게 하는 오일도포기을 제공하여야 한다는 과제를 해결하고자 한다.
Therefore, the present invention solves the problem of providing an oil applicator that can easily adjust the installation height of the oil ring roller of the oil applicator, and furthermore, while making the installation of the oil applicator stable and easily changing the installation position. I would like to.

위와 같은 과제를 해결하기 위하여 본 발명은, 기대와; 기대에 설치되는 두 개의 기둥과; 두 개의 기둥에 높낮이의 조절이 용이하게 설치되는 상하 한 쌍의 상부 오일링 롤러와 하부 오일링 롤러; 및 상기 상하 오일링 롤러에 설치되는 오일공급장치;로 구성되고, 기대는 그 저부에 고정 설치되는 고정용 자석과 들어올림 볼트(Hoisting bilt)를 가지며, 상부 오일링 롤러와 하부 오일링 롤러는 각각 기둥에 결합되는 하우징을 포함하며, 하우징은 오일링 롤러를 수납하는 축수와 기둥에의 조임볼트를 포함하는 것을 특징으로 하는 오일 도포기를 제공한다.The present invention, in order to solve the above problems; Two pillars mounted to the base; A pair of upper and lower upper oil ring rollers and a lower oil ring roller which are easily installed at two heights; And an oil supply device installed on the upper and lower oil ring rollers, and the base has a fixing magnet and a lifting bolt (Hoisting bilt) fixed to the bottom thereof, and the upper oil ring roller and the lower oil ring roller, respectively. And a housing coupled to the pillar, wherein the housing includes an axis bearing the oil ring roller and a tightening bolt to the pillar.

위와 같은 본 발명은, 기대가 그 저부의 고정용 자석으로 인하여 안정적으로 설치되게 하며, 또한, 설치 장소를 이동하고자 할 경우에는 들어올림볼트를 돌려 볼트 선단이 기대 저부 설치바닥을 밀어 기대가 들뜨게 함으로써 고정용 자석의 자력 영향력을 약화시켜 기대의 설치 장소 이동을 용이하게 하며, 또한 상하부 오일링 롤러를 설치한 하우징의 조임 볼트를 풀고 조임으로서 하우징의 상하 높이를 조절할 수 있게 하여 오일링 롤러의 설치 높이를 공급되는 프레싱 소재인 평판의 높이에 대응하게 할 수 있게 하는 효과가 있다.
The present invention as described above, the base is to be installed stably due to the fixing magnet of the bottom, and if you want to move the installation place by turning the lifting bolt to the end of the bolt by pushing the bottom of the base mounting base to lift the base The weakening of the magnetic force of the fixing magnet makes it easier to move the installation site of the expectation, and the height of the housing can be adjusted by loosening and tightening the tightening bolt of the housing where the upper and lower oil ring rollers are installed. There is an effect that can be made to correspond to the height of the plate which is the pressing material to be supplied.

도1은 본 발명의 일 실시예의 일부 절취 상태 정면도
도2는 본 발명의 하우징의 발췌 횡단면도
1 is a front view of a partially cut away state of an embodiment of the present invention
Figure 2 is an excerpt cross-sectional view of the housing of the present invention.

위와 같은 본 발명은 첨부된 도면에 의하여 설명한다. 첨부된 도면은 본 발명의 일 실시예이며, 따라서, 첨부된 도면에 의하여 본 발명의 구성이 한정되지 아니한다. 특히, 후술하는 청구항은 이해의 편의를 위하여 도면의 부호를 기재하였으나, 이러한 도면의 부호 기재로 그 형상이 한정되지 아니한다.The present invention as described above will be described by the accompanying drawings. The accompanying drawings are an embodiment of the present invention, and therefore, the configuration of the present invention is not limited by the accompanying drawings. In particular, the claims set forth below refer to the symbols in the drawings for the convenience of understanding, but the shapes thereof are not limited to the description of the symbols in the drawings.

기대(1)와; 기대(1)에 설치되는 두 개의 기둥(21, 22)과; 두 개의 기둥(21, 22)에 높낮이의 조절이 용이하게 설치되는 상하 한 쌍의 상부 오일링 롤러(31)와 하부 오일링 롤러(32); 및 상기 상하 오일링 롤러(31, 32)에 설치되는 오일공급장치(4);로 구성되고, 기대(1)는 그 저부에 고정 설치되는 고정용 자석(11)과 들어올림 볼트(12: Hoisting bolt)를 가지며, 상부 오일링 롤러(31)와 하부 오일링 롤러(32)는 각각 기둥에 결합되는 하우징(51, 52)을 포함하며, 하우징(51, 52)은 기둥에 하우징을 고정하기 위한 조임볼트(7)를 포함하는 것을 특징으로 하는 오일 도포기를 제공한다.Expectation 1; Two pillars 21 and 22 installed on the base 1; A pair of upper and lower upper oil ring rollers 31 and lower oil ring rollers 32, which are easily installed in two pillars 21 and 22, for height adjustment; And an oil supply device 4 installed on the upper and lower oil ring rollers 31 and 32, wherein the base 1 is a fixing magnet 11 and a lifting bolt 12 fixed to the bottom thereof. bolt), the upper oiling roller 31 and the lower oiling roller 32 each include housings 51 and 52 coupled to the poles, the housings 51 and 52 for fixing the housing to the poles. It provides an oil applicator, characterized in that it comprises a tightening bolt (7).

오일공급장치(4)는, 도1에 도시된 바와 같이, 탱크(41)와; 탱크(41)의 저부에 설치되어 상부오일링 롤러(31)에 오일을 공급하는 노즐(42); 및, 노즐(42)의 개폐장치(도면에 도시하지 않음)로 구성될 수 있다. 그러나, 오일공급장치(4)는 상기 일본 공개특허공고 H05-3177770으로 제공하는 오일공급장치가 선호될 수 있다.The oil supply device 4 includes a tank 41, as shown in FIG. A nozzle 42 installed at the bottom of the tank 41 to supply oil to the upper oiling roller 31; And an opening and closing device (not shown) of the nozzle 42. However, the oil supply device 4 may be preferred as the oil supply device provided in Japanese Laid-open Patent Publication H05-3177770.

프레스 가공을 위한 평판이 두 오일링 롤러(31)(32)사이를 통과하면서 평판에 오일이 균일하게 도포되게 된다. 이때 평판이 공급되는 높이 및 평판의 두께 따라 조임볼트(7)를 이용하여 오일링 롤러(31)(32)의 높이를 조절할 수 있다. As the plate for the press working passes between the two oil ring rollers 31 and 32, oil is uniformly applied to the plate. In this case, the height of the oil ring rollers 31 and 32 may be adjusted using the fastening bolts 7 according to the height of the flat plate and the thickness of the flat plate.

또한, 본 발명의 다른 실시예로서, 도2에 도시된 바와 같이, 오일공급장치(4)가 오일링 롤러(31)(32)의 회전축(33)에 직접 오일은 공급하는 구성이 적용될 수 있다. 즉, 상기오일공급장치(4)는, 오일을 저장하기 위한 탱크(41)와, 오일의 유량을 조절하는 벨브(43)와, 상기 벨브(43)에 연결되는 오일공급관(44)(45)을 포함하며, 상기 오일공급관(44)(45)은 하우징(51)(52) 내의 연결통로(53)에 연결되고, 연결통로(53)는 오일공급관(44)(45)을 하우징(51)(52)에 설치된 롤러축(33) 내의 오일통로(34)에 연결켜주며, 상기 롤러축(33)에 롤러프레임(35)이 연결구(36)에 의해 고정설치되고, 롤러프레임(35)의 외면을 감는 섬유층(37)이 설치되며, 상기 롤러축(33)과 롤러프레임(35)에 오일구멍(38)(39)이 설치된다.In addition, as another embodiment of the present invention, as shown in Figure 2, the oil supply device 4 can be applied to the configuration of supplying the oil directly to the rotary shaft 33 of the oil ring roller 31, 32 . That is, the oil supply device 4 includes a tank 41 for storing oil, a valve 43 for adjusting the flow rate of oil, and oil supply pipes 44 and 45 connected to the valve 43. The oil supply pipes 44 and 45 are connected to the connection passage 53 in the housings 51 and 52, and the connection passage 53 connects the oil supply pipes 44 and 45 to the housing 51. It is connected to the oil passage 34 in the roller shaft 33 installed in the 52, the roller frame 35 is fixed to the roller shaft 33 by the connector 36, the roller frame 35 of the A fiber layer 37 is wound around the outer surface, and oil holes 38 and 39 are provided in the roller shaft 33 and the roller frame 35.

즉, 탱크(41)의 오일이 오일공급관(44)(45)과, 하우징(51)(52) 내의 연결통로(53)를 통해 롤러축(33) 내의 오일통로(34)로 보내지며, 롤러축(33)과 롤러프레임(35)에 오일구멍(38)(39)으로 오일이 흘러나와 롤러프레임(35)의 외면을 감는 섬유층(37)을 오일로 적시게 된다. 흘러나오는 오일로 적셔지는 상기 섬유층(37)은 양모재질인 것이 바람직하다.
That is, the oil of the tank 41 is sent to the oil passage 34 in the roller shaft 33 through the oil supply pipes 44 and 45 and the connection passage 53 in the housings 51 and 52, and the roller Oil flows through the oil holes 38 and 39 in the shaft 33 and the roller frame 35 to wet the fiber layer 37 which winds the outer surface of the roller frame 35 with oil. It is preferable that the fiber layer 37 soaked with the oil flowing out is made of wool.

1: 기대
11: 자석
12: 들어올림 볼트
21, 22: 기둥
31: 상부 오일링 롤러
32: 하부 오일링 롤러
33. 롤러축
34. 오일통로
35. 롤러프레임
36. 연결구
37. 섬유층
4: 오일공급장치
41. 탱크
42. 노즐
43. 벨브
44, 45. 오일공급관
51, 52: 하우징
53. 연결통로
7: 조임볼트
1: expect
11: magnet
12: lifting bolt
21, 22: pillar
31: Upper oil ring roller
32: Lower oiling roller
33. Roller Shaft
34. Oil passage
35. Roller Frame
36. End Connection
37. Fibrous layer
4: oil supply unit
41.Tank
42. Nozzle
43. Valve
44, 45.Oil supply pipe
51, 52: housing
53. Connection passage
7: Tightening bolt

Claims (2)

기대(1)와; 기대(1)에 설치되는 두 개의 기둥(21, 22)과; 두 개의 기둥(21, 22)에 높낮이의 조절이 용이하게 설치되는 상하 한 쌍의 상부 오일링 롤러(31)와 하부 오일링 롤러(32); 및 상기 상하 오일링 롤러(31, 32)에 설치되는 오일공급장치(4);로 구성되고, 기대(1)는 그 저부에 고정 설치되는 고정용 자석(11)과 들어올림 볼트(12: Hoisting bolt)를 가지며, 상부 오일링 롤러(31)와 하부 오일링 롤러(32)는 각각 기둥에 결합되는 하우징(51, 52)을 포함하며, 하우징(51, 52)은 하우징을 기둥에 고정시키기 위한 조임볼트(7)를 포함하는 것을 특징으로 하는 프레스기용 오일 도포기.
Expectation 1; Two pillars 21 and 22 installed on the base 1; A pair of upper and lower upper oil ring rollers 31 and lower oil ring rollers 32, which are easily installed in two pillars 21 and 22, for height adjustment; And an oil supply device 4 installed on the upper and lower oil ring rollers 31 and 32, wherein the base 1 is a fixing magnet 11 and a lifting bolt 12 fixed to the bottom thereof. bolts), the upper oiling roller 31 and the lower oiling roller 32 each include housings 51 and 52 that are coupled to the posts, the housings 51 and 52 for securing the housing to the posts. Oil presser for a press machine, characterized in that it comprises a tightening bolt (7).
제1항에 있어서, 상기오일공급장치(4)는, 오일을 저장하기 위한 탱크(41)와, 유량을 조절하는 벨브(43)와, 상기 벨브(43)에 연결되는 오일공급관(44)(45)을 포함하며, 상기 오일공급관(44)(45)은 하우징(51)(52) 내의 연결통로(53)에 연결되고, 연결통로(53)는 오일공급관(44)(45)을 하우징(51)(52)에 설치된 롤러축(33) 내의 오일통로(34)에 연결시키며, 상기 롤러축(33)에 롤러프레임(35)이 연결구(36)에 의해 고정설치되고, 롤러프레임(35)의 외면을 감는 섬유층(37)이 설치되며, 상기 롤러축(33)과 롤러프레임(35)에 오일구멍(38)(39)이 설치된 것을 특징으로 하는 프레스기용 오일 도포기.The oil supply device (4) of claim 1, wherein the oil supply device (4) includes a tank (41) for storing oil, a valve (43) for adjusting a flow rate, and an oil supply pipe (44) connected to the valve (43). 45, wherein the oil supply pipes 44 and 45 are connected to the connection passage 53 in the housings 51 and 52, and the connection passage 53 connects the oil supply pipes 44 and 45 to the housing ( 51 and 52 connected to the oil passage 34 in the roller shaft 33, the roller frame 35 is fixed to the roller shaft 33 by the connector 36, the roller frame 35 Fiber layer (37) is wound around the outer surface of the, oil rollers (38), characterized in that the roller shaft (33) and the roller frame (35) is installed, the oil applicator for the press.
KR1020110020072A 2011-03-07 2011-03-07 Oil coating apparatus for press KR20120101933A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110020072A KR20120101933A (en) 2011-03-07 2011-03-07 Oil coating apparatus for press

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110020072A KR20120101933A (en) 2011-03-07 2011-03-07 Oil coating apparatus for press

Publications (1)

Publication Number Publication Date
KR20120101933A true KR20120101933A (en) 2012-09-17

Family

ID=47110707

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020110020072A KR20120101933A (en) 2011-03-07 2011-03-07 Oil coating apparatus for press

Country Status (1)

Country Link
KR (1) KR20120101933A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104941871A (en) * 2014-07-13 2015-09-30 方占萍 Automatic bolt oiling machine
KR20160068039A (en) * 2014-12-04 2016-06-15 주식회사 포스코 Apparatus of supplying material with grease
KR20200129635A (en) * 2019-05-09 2020-11-18 한재형 Press material base of oil application device
CN115445847A (en) * 2022-10-28 2022-12-09 珠海格力智能装备有限公司 Oiling mechanism and disc tube film production equipment

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104941871A (en) * 2014-07-13 2015-09-30 方占萍 Automatic bolt oiling machine
CN104941871B (en) * 2014-07-13 2017-07-07 方占萍 Automatic bolt oiling machine
KR20160068039A (en) * 2014-12-04 2016-06-15 주식회사 포스코 Apparatus of supplying material with grease
KR20200129635A (en) * 2019-05-09 2020-11-18 한재형 Press material base of oil application device
CN115445847A (en) * 2022-10-28 2022-12-09 珠海格力智能装备有限公司 Oiling mechanism and disc tube film production equipment

Similar Documents

Publication Publication Date Title
KR20120101933A (en) Oil coating apparatus for press
KR20140147400A (en) apparatus for exterior wall
CA2817404A1 (en) Scaffolding attachment arrangement
CN107824360A (en) A kind of column insulator RTV painting spraying devices
CN111676829A (en) Spraying maintenance system and method for cast-in-place box girder of viaduct bridge
CN102535509A (en) Construction method of high-flatness equipment foundation and adjusting structure thereof
CN213055316U (en) Curing device for prefabricated part
CN211137614U (en) Centrifugal concrete pile mould and flat car for placing same
CN205850637U (en) Automated production coating apparatus
CN206928074U (en) A kind of textile humidification device
CN215845862U (en) Non-stop pipeline installation and tapping design tool
CN101639311B (en) Cooling device for roller
CN201246414Y (en) Bearing base
CN104495644B (en) A kind of crane and crane gooseneck boom thereof
CN206298675U (en) A kind of drawing frame roller seat of easy disassembly
CN209084177U (en) A kind of anti-dropout suspension and support
CN202265705U (en) A-shaped support with adjustable winding/unwinding tension
CN207434839U (en) A kind of impeller hub suspender installs carrying device
CN206396410U (en) The single tube holder structure of single tube Yarn feeder
KR101119234B1 (en) Shutting apparatus for fountain stand and shutting system including the same
CN213927533U (en) Concrete spreader
CN204304688U (en) A kind of small hydropower station generator unit stator soleplate of improvement
CN209868992U (en) Guiding and deviation-rectifying device of ferry vehicle on concrete product production line
KR100471713B1 (en) Cover mounting system of slab concrete for appartment house
CN114016798B (en) Method for quickly replacing tower foundation steel groove of communication floor guyed tower

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
NORF Unpaid initial registration fee