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发明名称
DRAIN VALVE FOR REMOVING SETTLING MATERIALS
摘要
申请公布号
CA792574(A)
申请公布日期
1968.08.20
申请号
CAD792574
申请日期
申请人
GERALD J. SNYDER
发明人
GERALD J. SNYDER
分类号
主分类号
代理机构
代理人
主权项
地址
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