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发明名称
Cutter chain and cutter bar
摘要
申请公布号
US2139410(A)
申请公布日期
1938.12.06
申请号
US19340729704
申请日期
1934.06.08
申请人
THE JEFFREY MANUFACTURING COMPANY
发明人
JEFFREY ROBERT K.
分类号
E21C25/28
主分类号
E21C25/28
代理机构
代理人
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地址
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