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1.发明授权Roller mop wringer having carrying handle fixed to pivoted support for rollers 失效具有手柄的滚筒拖把装置固定到用于辊的枢转支撑件上
公开(公告)号：US2497468A
公开(公告)日：1950-02-14
申请号：US63902646
申请日：1946-01-04
Applicant: POIRIER
Inventor： POIRIER JAMES A , WILLIAM ROMBACH
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