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1.发明授权Method of obtaining vacuum tightness in cast metal structures of thin section and resulting products 失效获得薄壁铸造金属结构和产品的真空密封性的方法
公开(公告)号：US2821650A
公开(公告)日：1958-01-28
申请号：US24876651
申请日：1951-09-28
Applicant: GEN ELECTRIC
Inventor： ZUNICK MICHAEL J , ILLINGWORTH JOHN E
IPC: H01J35/12
CPC classification number: H01J35/12
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公开(公告)号：US2692958A
公开(公告)日：1954-10-26
申请号：US30496652
申请日：1952-08-18
Applicant: GEN ELECTRIC
Inventor： ZUNICK MICHAEL J , ILLINGWORTH JOHN E
IPC: H01J35/12
CPC classification number: H01J35/12 , Y10S428/939
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