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发明名称
Improvements relating to equipment for rotary rock drilling
摘要
申请公布号
GB686409(A)
申请公布日期
1953.01.21
申请号
GB19500010310
申请日期
1950.04.26
申请人
VICTOR PRODUCTS (WALLSEND) LIMITED
发明人
CAMERON ALEXANDER
分类号
E21B19/083
主分类号
E21B19/083
代理机构
代理人
主权项
地址
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