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公开(公告)号：US2977041A
公开(公告)日：1961-03-28
申请号：US77737858
申请日：1958-12-01
Applicant: LEYBOLDS NACHFOLGER E
Inventor： HANS-GEORG NOLLER , WERNER BACHLER
IPC: F04F9/00
CPC classification number: F04F9/00
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