| 发明名称 |
Two or more sub-surface pipes drawn into passage held by clamps maintaining parallel relationship |
| 摘要 |
A set of two or more underground pipes is drawn into a sub-surface passage. The spatial parallel relationships of the pipes is maintained by a series of clamps applied at intervals.
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| 申请公布号 |
DE10103859(A1) |
申请公布日期 |
2002.01.03 |
| 申请号 |
DE20011003859 |
申请日期 |
2001.01.30 |
| 申请人 |
STADTWERKE SCHWERTE GMBH |
发明人 |
JOHN, MARTIN;ROUS, KLAUS |
| 分类号 |
E21B7/20;E21B7/28;F16L3/223;F16L3/237;H02G1/08;(IPC1-7):F16L1/028;E21B7/18 |
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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