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公开(公告)号：US3307301A
公开(公告)日：1967-03-07
申请号：US44954565
申请日：1965-04-20
Applicant: AIR TECH IND INC
Inventor： THEODORE JACOBSOHN , BERTRAM JULIEN , HANS MEYER , KURT MEYER
IPC: E04H15/20
CPC classification number: E04H15/20 , E04H2015/201
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