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发明名称
Sheave assembly
摘要
申请公布号
US1865842(A)
申请公布日期
1932.07.05
申请号
US19280318681
申请日期
1928.11.12
申请人
EMSCO DERRICK & EQUIPMENT COMPANY
发明人
DAVIDSON WILLIAM D.
分类号
B66D3/06
主分类号
B66D3/06
代理机构
代理人
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地址
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