| 发明名称 |
Driven pipe for installation into a ground comprises a thin-walled metal or plastic inner pipe and a cast concrete outer pipe with thickened end sections |
| 摘要 |
<p>The driven pipe for installation into a ground comprises a thin-walled metal or plastic inner pipe (1) and a cast concrete outer pipe (2) with thickened end sections (3) with a smooth surface.</p> |
| 申请公布号 |
AT412572(B) |
申请公布日期 |
2005.04.25 |
| 申请号 |
AT20030001852 |
申请日期 |
2003.11.18 |
| 申请人 |
WOLTRON HERBERT DIPL.ING.;VACI GYULA;MERNYEI EMILIA |
发明人 |
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| 分类号 |
E21B7/20;E21B17/00;F16L9/14;F16L9/153;F16L21/03;(IPC1-7):F16L1/028 |
主分类号 |
E21B7/20 |
| 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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