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公开(公告)号：US3336749A
公开(公告)日：1967-08-22
申请号：US42024964
申请日：1964-12-16
Applicant: ROM FRANK E , LIETZKE ARMIN F , HYLAND ROBERT E
Inventor： ROM FRANK E , LIETZKE ARMIN F , HYLAND ROBERT E
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