| 发明名称 |
HELICALLY WOUND PIPES AND METHOD |
| 摘要 |
<p>Helically wound pipes and a method of making same is disclosed. The pipes are formed from pre-grooved strips which are helically wound and then seamed.</p> |
| 申请公布号 |
CA1135487(A) |
申请公布日期 |
1982.11.16 |
| 申请号 |
CA19790331117 |
申请日期 |
1979.07.04 |
| 申请人 |
WESTAFLEXWERK L. & F. WESTERBARKEY |
发明人 |
ESCANDELL, MANUEL |
| 分类号 |
B21C37/12;F16L11/16;(IPC1-7):65H81/00;16L11/16 |
主分类号 |
B21C37/12 |
| 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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