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发明名称
Hoist
摘要
申请公布号
US2720951(A)
申请公布日期
1955.10.18
申请号
US19490108329
申请日期
1949.08.03
申请人
OLSON GEORGE W
发明人
OLSON GEORGE W.
分类号
B66D1/20
主分类号
B66D1/20
代理机构
代理人
主权项
地址
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