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公开(公告)号：US2277760A
公开(公告)日：1942-03-31
申请号：US31274340
申请日：1940-01-06
Applicant: CORNING GLASS WORKS
Inventor： HOFFMAN VANCE E , KELM EVERETT F
IPC: G01F1/48
CPC classification number: G01F1/48 , Y10T137/8158
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