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公开(公告)号：US3474220A
公开(公告)日：1969-10-21
申请号：US3474220D
申请日：1967-05-17
Applicant: WEBB JAMES E , NASA
Inventor： HANCHEY KARL K , MAHAN JAMES C , KUBIK JAMES S
IPC: B23K15/00 , H01J37/248 , B23K9/00
CPC classification number: B23K15/0026 , H01J37/248
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