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发明名称
VALVE ASSEMBLY AND SEAT
摘要
申请公布号
GB2113807(B)
申请公布日期
1985.11.20
申请号
GB19820028553
申请日期
1982.10.06
申请人
* NL INDUSTRIES INC
发明人
NORMAN A * NELSON
分类号
F16K3/02;(IPC1-7):F16K3/30
主分类号
F16K3/02
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代理人
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