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公开(公告)号:US2793748A
公开(公告)日:1957-05-28
申请号:US22271351
申请日:1951-04-24
Applicant: STAMICARBON
Inventor: CONRAD HERKENHOFF EARL
公开(公告)号:US2793748A
公开(公告)日:1957-05-28
申请号:US22271351
申请日:1951-04-24
Applicant: STAMICARBON
Inventor: CONRAD HERKENHOFF EARL