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公开(公告)号：US2276986A
公开(公告)日：1942-03-17
申请号：US29410239
申请日：1939-09-09
Applicant: BELL TELEPHONE LABOR INC
Inventor： KEMP ARCHIE R , STRAITIFF WILLIAM G
IPC: C08C1/06
CPC classification number: C08C1/06 , Y10S528/937
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