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公开(公告)号：US1764458A
公开(公告)日：1930-06-17
申请号：US18084227
申请日：1927-04-04
Applicant: ANDY MCLEAN
Inventor： ANDY MCLEAN
IPC: F04B53/14
CPC classification number: F04B53/143 , Y10S277/907
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