Sand protected by-pass seal,申请号US19290413758-传众专利搜索

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发明名称	Sand protected by-pass seal
摘要
申请公布号	US1924203(A)	申请公布日期	1933.08.29
申请号	US19290413758	申请日期	1929.12.13
申请人	WINTROATH PUMPS, LTD.	发明人	WINTROATH JOHN A.
分类号	F04D7/04;F04D29/22;F04D29/70	主分类号	F04D7/04
代理机构		代理人
主权项
地址

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