| 发明名称 |
COMPOSITE STEEL PIPE AND ITS MANUFACTURING METHOD |
| 摘要 |
<p>PURPOSE:To improve the bond strength of concrete for a composite steel pipe filled with concrete, by making zigzag intermittent projected streaks at a right angle to the pipe's axial direction and at constant intervals on the inner surface of the pipe.</p> |
| 申请公布号 |
JPS5353021(A) |
申请公布日期 |
1978.05.15 |
| 申请号 |
JP19760127263 |
申请日期 |
1976.10.25 |
| 申请人 |
NIPPON KOKAN KK |
发明人 |
ENDOU FUSAO;NAKAGAWA EISAKU |
| 分类号 |
F16L9/14;E02D5/30;F16L9/02 |
主分类号 |
F16L9/14 |
| 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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