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发明名称
Trip-latch jack
摘要
申请公布号
US1749379(A)
申请公布日期
1930.03.04
申请号
US19270227199
申请日期
1927.10.19
申请人
HINDERLITER FRANK J
发明人
HINDERLITER FRANK J.
分类号
E21B31/12
主分类号
E21B31/12
代理机构
代理人
主权项
地址
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