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发明名称
Actuating device
摘要
申请公布号
US2892258(A)
申请公布日期
1959.06.30
申请号
US19570672679
申请日期
1957.07.18
申请人
WELEX, INC.
发明人
JR. BLISS ADAMSON,
分类号
E21B47/08
主分类号
E21B47/08
代理机构
代理人
主权项
地址
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