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公开(公告)号:US2893500A
公开(公告)日:1959-07-07
申请号:US60550856
申请日:1956-08-22
Applicant: DEBAUN
Inventor: DEBAUN JOHN E , FRIEDRICH ANDREW E
公开(公告)号:US2893500A
公开(公告)日:1959-07-07
申请号:US60550856
申请日:1956-08-22
Applicant: DEBAUN
Inventor: DEBAUN JOHN E , FRIEDRICH ANDREW E