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发明名称
Drop hammer lifting means
摘要
申请公布号
GB502001(A)
申请公布日期
1939.03.09
申请号
GB19380016651
申请日期
1938.06.03
申请人
WILLIAM WALLACE CRILEY
发明人
分类号
B21J7/36
主分类号
B21J7/36
代理机构
代理人
主权项
地址
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