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公开(公告)号：US2056309A
公开(公告)日：1936-10-06
申请号：US68974333
申请日：1933-09-16
Applicant: WERNER OSENBERG OSKAR EWALD
Inventor： WERNER OSENBERG OSKAR EWALD
IPC: F16B19/02
CPC classification number: F16B19/02
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