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公开(公告)号:US2933327A
公开(公告)日:1960-04-19
申请号:US75094158
申请日:1958-07-25
Applicant: BENSON JOHN L , NORFLEET CHARLES E
Inventor: BENSON JOHN L , NORFLEET CHARLES E
公开(公告)号:US2933327A
公开(公告)日:1960-04-19
申请号:US75094158
申请日:1958-07-25
Applicant: BENSON JOHN L , NORFLEET CHARLES E
Inventor: BENSON JOHN L , NORFLEET CHARLES E