Rotary piercing processes,申请号US19510243727-传众专利搜索

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发明名称	Rotary piercing processes
摘要
申请公布号	US2791924(A)	申请公布日期	1957.05.14
申请号	US19510243727	申请日期	1951.08.25
申请人	THE BABCOCK & WILCOX COMPANY	发明人	SAWYER LUKE E.
分类号	B21B19/04;B21B25/04	主分类号	B21B19/04
代理机构		代理人
主权项
地址

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