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公开(公告)号:US2893544A
公开(公告)日:1959-07-07
申请号:US42708854
申请日:1954-05-03
Applicant: RUSSELL KENNETH F
Inventor: RUSSELL KENNETH F
公开(公告)号:US2893544A
公开(公告)日:1959-07-07
申请号:US42708854
申请日:1954-05-03
Applicant: RUSSELL KENNETH F
Inventor: RUSSELL KENNETH F