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公开(公告)号：US2275573A
公开(公告)日：1942-03-10
申请号：US33337440
申请日：1940-05-04
Applicant: ALUMINUM CO OF AMERICA
Inventor： STURM ROLLAND G , ERNEST JEFFRIES
IPC: F16F7/12
CPC classification number: F16F7/12
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