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公开(公告)号：US2793656A
公开(公告)日：1957-05-28
申请号：US38306853
申请日：1953-09-29
Applicant: ELECTROL INC
Inventor： FRAIN JOHN P , FRANK TWOHIG
CPC classification number: F16K47/00 , F16K17/0433 , Y10T137/7738 , Y10T137/7852 , Y10T137/7928
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