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发明名称
Rock breakers
摘要
申请公布号
US2787943(A)
申请公布日期
1957.04.09
申请号
US19540421606
申请日期
1954.04.07
申请人
BROWNING JAMES E
发明人
BROWNING JAMES E.
分类号
A01B77/00;E02F3/76
主分类号
A01B77/00
代理机构
代理人
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地址
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