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发明名称
Automatic reverse ratcheting hoist
摘要
申请公布号
US1937331(A)
申请公布日期
1933.11.28
申请号
US19320595087
申请日期
1932.02.25
申请人
COFFING FREDRICK W
发明人
COFFING FREDRICK W.
分类号
B66D3/14
主分类号
B66D3/14
代理机构
代理人
主权项
地址
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