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公开(公告)号：US2648296A
公开(公告)日：1953-08-11
申请号：US3008948
申请日：1948-05-29
Applicant: OLIVER SENNET A
Inventor： OLIVER SENNET A
IPC: B30B11/20
CPC classification number: B30B11/208 , B30B11/201 , B30B11/202 , Y10S425/23
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