JPH0730757Y2 - マンホール - Google Patents
マンホールInfo
- Publication number
- JPH0730757Y2 JPH0730757Y2 JP1987001556U JP155687U JPH0730757Y2 JP H0730757 Y2 JPH0730757 Y2 JP H0730757Y2 JP 1987001556 U JP1987001556 U JP 1987001556U JP 155687 U JP155687 U JP 155687U JP H0730757 Y2 JPH0730757 Y2 JP H0730757Y2
- Authority
- JP
- Japan
- Prior art keywords
- manhole
- manhole cover
- seat
- wall
- sheet
- 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 - Lifetime
Links
- 230000002093 peripheral effect Effects 0.000 claims description 15
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000004576 sand Substances 0.000 description 20
- 230000000694 effects Effects 0.000 description 5
- 238000005299 abrasion Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000001141 propulsive effect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 150000004756 silanes Chemical class 0.000 description 1
- 150000003673 urethanes Chemical class 0.000 description 1
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987001556U JPH0730757Y2 (ja) | 1987-01-09 | 1987-01-09 | マンホール |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987001556U JPH0730757Y2 (ja) | 1987-01-09 | 1987-01-09 | マンホール |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63112549U JPS63112549U (enExample) | 1988-07-20 |
| JPH0730757Y2 true JPH0730757Y2 (ja) | 1995-07-19 |
Family
ID=30779574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987001556U Expired - Lifetime JPH0730757Y2 (ja) | 1987-01-09 | 1987-01-09 | マンホール |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0730757Y2 (enExample) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5022821A (enExample) * | 1973-06-28 | 1975-03-11 | ||
| JPS5082548U (enExample) * | 1973-11-29 | 1975-07-15 |
-
1987
- 1987-01-09 JP JP1987001556U patent/JPH0730757Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63112549U (enExample) | 1988-07-20 |
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