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经营范围
发明名称
Selective shifting tool
摘要
申请公布号
US3414060(A)
申请公布日期
1968.12.03
申请号
US19670684172
申请日期
1967.11.20
申请人
JOSEPH T. ZAK
发明人
ZAK JOSEPH T.
分类号
E21B34/14
主分类号
E21B34/14
代理机构
代理人
主权项
地址
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