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发明名称
APPARATUS FOR USE IN SERVICING VALVES
摘要
申请公布号
US5228178(A)
申请公布日期
1993.07.20
申请号
US19920872234
申请日期
1992.04.22
申请人
BRITISH GAS PLC
发明人
STICKLEY, ANDREW J.
分类号
F16K;F16K43/00
主分类号
F16K
代理机构
代理人
主权项
地址
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