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公开(公告)号：US2988704A
公开(公告)日：1961-06-13
申请号：US84602859
申请日：1959-10-12
Applicant: GEN DYNAMICS CORP
Inventor： WALKER WATSON F , NUGENT JOHN A
IPC: H03D1/18
CPC classification number: H03D1/18
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