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公开(公告)号：US1732784A
公开(公告)日：1929-10-22
申请号：US31095528
申请日：1928-10-08
Applicant: CUNO ENG CORP
Inventor： WOLFSON SIDNEY L , SCHOEN CHARLES C
IPC: F23Q7/00
CPC classification number: F23Q7/00
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