发明名称 |
Mining machine |
摘要 |
|
申请公布号 |
US1803547(A) |
申请公布日期 |
1931.05.05 |
申请号 |
US19280312132 |
申请日期 |
1928.10.12 |
申请人 |
DILLON JAMES E |
发明人 |
DILLON JAMES E. |
分类号 |
E21C31/00 |
主分类号 |
E21C31/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|
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