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公开(公告)号：US1962225A
公开(公告)日：1934-06-12
申请号：US55050831
申请日：1931-07-13
Applicant: WICKWIRE SPENCER STEEL COMPANY
Inventor： WOODMAN FRANCIS N , NELSON GEORGE W , HERBERT SMITH
IPC: F24D19/06
CPC classification number: F24D19/06
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