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发明名称
Spiralbohrer fuer broecklige Gesteinsarten
摘要
申请公布号
DE520130(C)
申请公布日期
1931.03.07
申请号
DE1928R073719D
申请日期
1928.02.21
申请人
JOHN JOSEPH RAWLINGS;THE RAWLPLUG COMPANY LIMITED
发明人
分类号
B23B51/02;H02G15/04
主分类号
B23B51/02
代理机构
代理人
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地址
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