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公开(公告)号：US994109A
公开(公告)日：1911-06-06
申请号：US1907390445
申请日：1907-08-28
Applicant: WOLFF MFG COMPANY L
Inventor： BECK JOHN F , LINDSAY WILLIAM
CPC classification number: B07B1/42 , Y10T74/18312
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