JPH0434195Y2 - - Google Patents
Info
- Publication number
- JPH0434195Y2 JPH0434195Y2 JP1986178683U JP17868386U JPH0434195Y2 JP H0434195 Y2 JPH0434195 Y2 JP H0434195Y2 JP 1986178683 U JP1986178683 U JP 1986178683U JP 17868386 U JP17868386 U JP 17868386U JP H0434195 Y2 JPH0434195 Y2 JP H0434195Y2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- thin
- annular portion
- underdrain
- thickness
- 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
- 229920003002 synthetic resin Polymers 0.000 claims description 8
- 239000000057 synthetic resin Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000010276 construction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Rigid Pipes And Flexible Pipes (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986178683U JPH0434195Y2 (fr) | 1986-11-20 | 1986-11-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986178683U JPH0434195Y2 (fr) | 1986-11-20 | 1986-11-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6386135U JPS6386135U (fr) | 1988-06-06 |
| JPH0434195Y2 true JPH0434195Y2 (fr) | 1992-08-14 |
Family
ID=31121047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986178683U Expired JPH0434195Y2 (fr) | 1986-11-20 | 1986-11-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0434195Y2 (fr) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5336692A (en) * | 1976-09-17 | 1978-04-05 | Matsushita Electric Ind Co Ltd | Manufacturing method of ferrite core |
-
1986
- 1986-11-20 JP JP1986178683U patent/JPH0434195Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5336692A (en) * | 1976-09-17 | 1978-04-05 | Matsushita Electric Ind Co Ltd | Manufacturing method of ferrite core |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6386135U (fr) | 1988-06-06 |
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