| 发明名称 |
Synthetic resin corrugated pipe having a concave-convex surface |
| 摘要 |
<p>A synthetic resin corrugated pipe includes a pipe wall (1) having an annularly- or helically-shaped convex-concave surface (2,3). The convex-concave surface has a plurality of convex portions (2) having a quadrangular cross-sectional shape and a plurality of concave portions (3) having a circular cross-sectional shape. <IMAGE></p> |
| 申请公布号 |
EP0727606(A1) |
申请公布日期 |
1996.08.21 |
| 申请号 |
EP19960102117 |
申请日期 |
1996.02.13 |
| 申请人 |
KANAO, CHIZUKO;KANAO, SHIGEKI |
发明人 |
KANAO, SHIRO |
| 分类号 |
F16L11/11;F16L9/00;F16L9/06;F16L25/00;G02B6/44;(IPC1-7):F16L9/00;F16L7/00 |
主分类号 |
F16L11/11 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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