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发明名称
WELL DRILLING APPENDAGE OR DEVICE
摘要
申请公布号
CA574282(A)
申请公布日期
1959.04.21
申请号
CAD574282
申请日期
申请人
JAMES VANCE
发明人
JAMES VANCE
分类号
主分类号
代理机构
代理人
主权项
地址
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