JPS5024104A - |
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| 申请号 | JP13727673 | 申请日 | 1973-12-07 | 公开(公告)号 | JPS5024104A | 公开(公告)日 | 1975-03-15 |
| 申请人 | 发明人 | ||||||
| 摘要 | This pipe comprises two layers of profiled rods helically wound in opposite directions. | ||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
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JPS5024104A - |
|||||||
| 申请号 | JP13727673 | 申请日 | 1973-12-07 | 公开(公告)号 | JPS5024104A | 公开(公告)日 | 1975-03-15 |
| 申请人 | 发明人 | ||||||
| 摘要 | This pipe comprises two layers of profiled rods helically wound in opposite directions. | ||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||