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公开(公告)号：US2307338A
公开(公告)日：1943-01-05
申请号：US36909640
申请日：1940-12-07
Applicant: SLUYTER ROSS E , MALTBY CHARLES F
Inventor： SLUYTER ROSS E , MALTBY CHARLES F
IPC: E04F19/04
CPC classification number: E04F19/0495
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