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公开(公告)号：US2805623A
公开(公告)日：1957-09-10
申请号：US24556651
申请日：1951-09-07
Applicant: BLAIR RAYMOND H , PERTSCH JOSEPH L , SCRIBNER KENNETH R
Inventor： BLAIR RAYMOND H , PERTSCH JOSEPH L , SCRIBNER KENNETH R
IPC: F42C9/14 , F42C15/188
CPC classification number: F42C15/188 , F42C9/14
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