JPH039776Y2 - - Google Patents
Info
- Publication number
- JPH039776Y2 JPH039776Y2 JP3949387U JP3949387U JPH039776Y2 JP H039776 Y2 JPH039776 Y2 JP H039776Y2 JP 3949387 U JP3949387 U JP 3949387U JP 3949387 U JP3949387 U JP 3949387U JP H039776 Y2 JPH039776 Y2 JP H039776Y2
- Authority
- JP
- Japan
- Prior art keywords
- filter
- filter unit
- manhole
- gasket
- 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
- 238000007789 sealing Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 description 5
- 230000002285 radioactive effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Filtering Of Dispersed Particles In Gases (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3949387U JPH039776Y2 (enExample) | 1987-03-17 | 1987-03-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3949387U JPH039776Y2 (enExample) | 1987-03-17 | 1987-03-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63149213U JPS63149213U (enExample) | 1988-09-30 |
| JPH039776Y2 true JPH039776Y2 (enExample) | 1991-03-12 |
Family
ID=30852711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3949387U Expired JPH039776Y2 (enExample) | 1987-03-17 | 1987-03-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH039776Y2 (enExample) |
-
1987
- 1987-03-17 JP JP3949387U patent/JPH039776Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63149213U (enExample) | 1988-09-30 |
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