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公开(公告)号：US1380142A
公开(公告)日：1921-05-31
申请号：US33873419
申请日：1919-11-17
Applicant: EASTERN MFG COMPANY
Inventor： HANSON HUGO H , WALKER ALBERT C
IPC: C25D3/22
CPC classification number: C25D3/22
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