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经营范围
发明名称
TEST TREE
摘要
申请公布号
SG69186(G)
申请公布日期
1987.03.27
申请号
SG19860000691
申请日期
1986.08.20
申请人
OTIS ENGINEERING CORP.
发明人
分类号
E21B34/00;E21B34/04;E21B34/10;(IPC1-7):E21B34/04
主分类号
E21B34/00
代理机构
代理人
主权项
地址
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