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公开(公告)号：US3411758A
公开(公告)日：1968-11-19
申请号：US70494268
申请日：1968-02-12
Applicant: PHILIP DAVID EDMONDSON
Inventor： DAVID EDMONDSON PHILIP
IPC: F28C1/00
CPC classification number: F28C1/00 , Y10S261/11 , Y10S261/77
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