JPH03435Y2 - - Google Patents
Info
- Publication number
- JPH03435Y2 JPH03435Y2 JP18783285U JP18783285U JPH03435Y2 JP H03435 Y2 JPH03435 Y2 JP H03435Y2 JP 18783285 U JP18783285 U JP 18783285U JP 18783285 U JP18783285 U JP 18783285U JP H03435 Y2 JPH03435 Y2 JP H03435Y2
- Authority
- JP
- Japan
- Prior art keywords
- safety net
- manhole
- flat plate
- hook
- manhole cover
- 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.)
- Expired
Links
- 239000004568 cement Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18783285U JPH03435Y2 (en]) | 1985-12-05 | 1985-12-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18783285U JPH03435Y2 (en]) | 1985-12-05 | 1985-12-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6299645U JPS6299645U (en]) | 1987-06-25 |
| JPH03435Y2 true JPH03435Y2 (en]) | 1991-01-09 |
Family
ID=31138651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18783285U Expired JPH03435Y2 (en]) | 1985-12-05 | 1985-12-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03435Y2 (en]) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102823828B1 (ko) * | 2025-01-02 | 2025-06-24 | 주식회사 에스엠씨 | 추락방지용 상하수도 고강도 플라스틱 맨홀 |
-
1985
- 1985-12-05 JP JP18783285U patent/JPH03435Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6299645U (en]) | 1987-06-25 |
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