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发明名称
Releasable lock for guide bushings
摘要
申请公布号
US2536424(A)
申请公布日期
1951.01.02
申请号
US19450583868
申请日期
1945.03.21
申请人
JOY MANUFACTURING COMPANY
发明人
CURTIS JOHN C.
分类号
E21B1/30
主分类号
E21B1/30
代理机构
代理人
主权项
地址
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