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发明名称
Boom swinging apparatus
摘要
申请公布号
US1885937(A)
申请公布日期
1932.11.01
申请号
US19290359763
申请日期
1929.05.02
申请人
MCWILLIAMS DREDGING COMPANY
发明人
MCWILLIAMS GEORGE A.
分类号
B66C23/84
主分类号
B66C23/84
代理机构
代理人
主权项
地址
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