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公开(公告)号：US3332177A
公开(公告)日：1967-07-25
申请号：US45678365
申请日：1965-05-18
Applicant: STEINTHAL & COMPANY INC M
Inventor： SEPP OSCAR W
IPC: E04H15/20
CPC classification number: E04H15/20 , E04H2015/201 , E04H2015/204 , E04H2015/206
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