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发明名称
IMPROVEMENTS IN OR RELATING TO BALL VALVES
摘要
申请公布号
GB8830192(D0)
申请公布日期
1989.02.22
申请号
GB19880030192
申请日期
1988.12.23
申请人
T & N TECHNOLOGY LIMITED
发明人
分类号
主分类号
代理机构
代理人
主权项
地址
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