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经营范围
发明名称
BOTTOM SAMPLER
摘要
申请公布号
US3561547(A)
申请公布日期
1971.02.09
申请号
USD3561547
申请日期
1968.09.18
申请人
NORTH AMERICAN ROCKWELL CORP.
发明人
VLASH A. PULLOS
分类号
E21B7/124;E21B25/18;(IPC1-7):E21B7/12;E21B25/00
主分类号
E21B7/124
代理机构
代理人
主权项
地址
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