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经营范围
发明名称
WELL JARS
摘要
申请公布号
GB1548821(A)
申请公布日期
1979.07.18
申请号
GB19770001095
申请日期
1977.01.12
申请人
SMITH INTERNATIONAL INC
发明人
分类号
E21B31/107;E21B31/113;(IPC1-7):E21B1/10
主分类号
E21B31/107
代理机构
代理人
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地址
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