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公开(公告)号：US3109445A
公开(公告)日：1963-11-05
申请号：US6221060
申请日：1960-10-12
Applicant: ROPER HYDRAULICS INC
Inventor： HOLMES JR JOHN D
IPC: B60P3/22
CPC classification number: B60P3/224 , Y10T137/6892
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