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发明名称
AUGER BLADE BIT FOR EARTH BORING DEVICES
摘要
申请公布号
CA499809(A)
申请公布日期
1954.02.09
申请号
CAD499809
申请日期
申请人
HARRY GREEVES
发明人
HARRY GREEVES
分类号
主分类号
代理机构
代理人
主权项
地址
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