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公开(公告)号：US2140611A
公开(公告)日：1938-12-20
申请号：US5028235
申请日：1935-11-18
Applicant: ALUMINUM CO OF AMERICA
Inventor： SMITH CHARLES N , WILLARD JOHN R
IPC: F25D25/02
CPC classification number: F25D25/021
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