| 发明名称 |
Pipe welding machine |
| 摘要 |
|
| 申请公布号 |
US1906987(A) |
申请公布日期 |
1933.05.02 |
| 申请号 |
US19310567213 |
申请日期 |
1931.10.06 |
| 申请人 |
JOHN S. BEALL |
发明人 |
MCDOUGALL GEORGE F. |
| 分类号 |
B21C37/08 |
主分类号 |
B21C37/08 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
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