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发明名称
Pitman lock ring
摘要
申请公布号
US2147534(A)
申请公布日期
1939.02.14
申请号
US19370157609
申请日期
1937.08.05
申请人
KINGSBURY BERT C
发明人
KINGSBURY BERT C.
分类号
F16B21/12
主分类号
F16B21/12
代理机构
代理人
主权项
地址
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