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公开(公告)号：US2801229A
公开(公告)日：1957-07-30
申请号：US37114853
申请日：1953-07-29
Applicant: SHELL DEV
Inventor： DE HOFF RONALD L , PARRY HARVEY L
IPC: C08G59/50
CPC classification number: C08G59/5033
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