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公开(公告)号：US2137135A
公开(公告)日：1938-11-15
申请号：US9611236
申请日：1936-08-14
Applicant: GEN ELECTRIC
Inventor： KITSUZO FUWA , SHUYO ITO
IPC: C04B35/46
CPC classification number: C04B35/46
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