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公开(公告)号：US1935574A
公开(公告)日：1933-11-14
申请号：US50701931
申请日：1931-01-06
Applicant: CELOTEX COMPANY
Inventor： MUNROE TREADWAY B , WALLACE WATERFALL
IPC: E04B1/82
CPC classification number: E04B1/82 , E04B2001/8263 , E04B2001/8281
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