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公开(公告)号：US2648262A
公开(公告)日：1953-08-11
申请号：US4757848
申请日：1948-09-03
Applicant: AMERICAN MFG COMPANY INC
Inventor： CROSTON EDWARD L , HARBORD HORACE R
IPC: D21J1/00
CPC classification number: D21J1/00
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