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公开(公告)号：US1991772A
公开(公告)日：1935-02-19
申请号：US65350233
申请日：1933-01-25
Applicant: J A ZURN MFG COMPANY
Inventor： RIEGER EDWARD M , WAYNE PAULIN , ZURN MELVIN A
IPC: E04D13/04
CPC classification number: E04D13/0409 , E04D2013/0413 , E04D2013/0436
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