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经营范围
发明名称
Plug valve assembly
摘要
申请公布号
GB9418180(D0)
申请公布日期
1994.10.26
申请号
GB19940018180
申请日期
1994.09.09
申请人
OMEGA DEVELOPMENT & ENGINEERING LIMITED
发明人
分类号
E21B34/10;E21B34/14
主分类号
E21B34/10
代理机构
代理人
主权项
地址
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