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公开(公告)号：US2348938A
公开(公告)日：1944-05-16
申请号：US37659641
申请日：1941-01-30
Applicant: SHARPLES CORP
Inventor： STAHL HAROLD A , JONES LEO D
CPC classification number: C11B13/00 , B01D17/0214 , Y02W30/74
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