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公开(公告)号：US2184722A
公开(公告)日：1939-12-26
申请号：US17513037
申请日：1937-11-17
Applicant: MCLOUGHLIN GEORGE E
Inventor： MCLOUGHLIN GEORGE E
IPC: E03C1/324
CPC classification number: E03C1/324 , E03C2201/90 , Y10S4/02
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