| 发明名称 |
Pump jack |
| 摘要 |
|
| 申请公布号 |
US2147037(A) |
申请公布日期 |
1939.02.14 |
| 申请号 |
US19370171740 |
申请日期 |
1937.10.29 |
| 申请人 |
MARK HUNEFELD |
发明人 |
HUNEFELD MARK |
| 分类号 |
F04B9/04 |
主分类号 |
F04B9/04 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
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