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发明名称
ROTARY BALL VALVES
摘要
申请公布号
CA878343(A)
申请公布日期
1971.08.17
申请号
CAD878343
申请日期
申请人
B.C. RICHARDS AND CO. PTY. LTD.
发明人
CECIL G. F. RICHARDS
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主分类号
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代理人
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