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公开(公告)号：US2036740A
公开(公告)日：1936-04-07
申请号：US63653632
申请日：1932-10-06
Applicant: ALUMINUM CO OF AMERICA
Inventor： HELMER BENGSTON
CPC classification number: F16J9/22 , F02F3/10 , F05C2201/021
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