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介绍一种带预夹紧装置的加工活塞精基准数控车床，卡盘夹紧及打中心孔油缸结构特点，以及一种新型预夹紧油路设计要点。
Introduce a kind of machining piston fine reference CNC lathe with pre - clamping device, chuck clamping and centering hole cylinder structure features, and a new design point of pre - clamping oil circuit.