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公开(公告)号：US3477482A
公开(公告)日：1969-11-11
申请号：US3477482D
申请日：1968-01-23
Applicant: OTTO JACKLE
Inventor： HEILIG ALFRED , ZERRER GERHARD
IPC: B27L1/00
CPC classification number: B27L1/005
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