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公开(公告)号：US2257167A
公开(公告)日：1941-09-30
申请号：US21685438
申请日：1938-06-30
Applicant: STANDARD OIL DEV CO
Inventor： GERHARDT PHILIP B , SOMMER JULIUS V
IPC: C08J7/06
CPC classification number: C08J7/065 , C08J2323/22 , Y10T428/31938
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