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公开(公告)号：US2002204A
公开(公告)日：1935-05-21
申请号：US69151033
申请日：1933-09-29
Applicant: BELL TELEPHONE LABOR INC
Inventor： INGMANSON JOHN H , MUELLER GEORGE S
IPC: C08C3/02
CPC classification number: C08C3/02 , Y10S528/933
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