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公开(公告)号：US3412412A
公开(公告)日：1968-11-26
申请号：US52345566
申请日：1966-01-27
Applicant: STANRAY CORP
Inventor： KJERULF HANS F , WARNER HARRY L
IPC: B64F1/305
CPC classification number: B64F1/3055
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