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公开(公告)号:US2240053A
公开(公告)日:1941-04-29
申请号:US26606539
申请日:1939-04-05
Applicant: KING RICHARDSON
Inventor: KING RICHARDSON
IPC: G01J3/52
CPC classification number: G01J3/522
公开(公告)号:US2240053A
公开(公告)日:1941-04-29
申请号:US26606539
申请日:1939-04-05
Applicant: KING RICHARDSON
Inventor: KING RICHARDSON
IPC: G01J3/52
CPC classification number: G01J3/522