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发明名称
SPHERICAL SEATED INSPECTION AND CLEAN-OUT OPENING PORT
摘要
申请公布号
CA639493(A)
申请公布日期
1962.04.10
申请号
CAD639493
申请日期
申请人
VIVIAN H. CULLEN
发明人
VIVIAN H. CULLEN
分类号
主分类号
代理机构
代理人
主权项
地址
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