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发明名称
Perfectionnements apportés aux dispositifs de perforation à charge explosive, notamment à ceux devant être utilisés dans des puits
摘要
申请公布号
FR1213701(A)
申请公布日期
1960.04.04
申请号
FRD1213701
申请日期
1958.10.13
申请人
BORG-WARNER CORPORATION;WELEX INC.
发明人
分类号
E21B43/117
主分类号
E21B43/117
代理机构
代理人
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地址
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