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公开(公告)号：US2126334A
公开(公告)日：1938-08-09
申请号：US14288537
申请日：1937-05-15
Applicant: SHELL DEV
Inventor： LEONARD LANGEDIJK SIEGFRIED , WILLIEM COLTOF
IPC: C11B3/06
CPC classification number: C11B3/06
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