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公开(公告)号：US2324577A
公开(公告)日：1943-07-20
申请号：US37243040
申请日：1940-12-30
Applicant: SHELL DEV
Inventor： HAFFNER HAROLD J , SIEGELMAN GEORGE A , VON FUCHS GEORGE HUGO
IPC: C23F11/12
CPC classification number: C23F11/126
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