Pull it out quickly, pressing against the top of the lock cylinder while gently turning your wrench.
快速地把它抽出来，轻轻转动扳手，同时紧压锁芯顶部。
This paper mainly carries on the design of hydraulic wrench structure, including the design of the hydraulic cylinder, a ratchet mechanism design and strength check.
本文主要对大扭矩液压扳手结构进行设计，包括液压缸的设计，棘轮机构的设计及强度校核等。
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