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公开(公告)号：US2661809A
公开(公告)日：1953-12-08
申请号：US19705450
申请日：1950-11-22
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： HEWITT GEORGE W , LAGARIAS JOHN S
IPC: B03C3/40
CPC classification number: B03C3/40
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