Balanced valved thief-hole cover,申请号US19310527225-传众专利搜索

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发明名称	Balanced valved thief-hole cover
摘要
申请公布号	US1977390(A)	申请公布日期	1934.10.16
申请号	US19310527225	申请日期	1931.04.02
申请人	KRAMER ANDREW A	发明人	KRAMER ANDREW A.
分类号	F16J13/18	主分类号	F16J13/18
代理机构		代理人
主权项
地址

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