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发明名称
Boring appliance
摘要
申请公布号
US1817986(A)
申请公布日期
1931.08.11
申请号
US19310520862
申请日期
1931.03.06
申请人
ALKUNOWITSCH KAPELUCHNIKOFF MA
发明人
KAPELUCHNIKOFF MATHIEU ALKUNOWITSCH
分类号
E21B10/32
主分类号
E21B10/32
代理机构
代理人
主权项
地址
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