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公开(公告)号：US3368611A
公开(公告)日：1968-02-13
申请号：US65517467
申请日：1967-07-21
Applicant: GEN MOTORS CORP
Inventor： BRACKEN JR JOSEPH W , ZEEK RICHARD M
IPC: F28D19/04
CPC classification number: F28D19/047 , Y10S165/022
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