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1．CNC加工使用刀具的种类 常用的数控铣刀具按形状分为平底刀、圆鼻刀和球刀3种。 每种刀具都有其特定的作用，具体的如下： （1）平底刀 CNC加工中心的平底刀也叫平刀或端铣刀， . Offering exclusive content not available on hub. Please Contact Support. We update our videos daily to ensure you always get the best quality sex movies. Explore tons of XXX movies with gay sex scenes in on xHamster!. Go Back You are now leaving hub. 什么是CNC加工？ CNC加工（计算机数控加工，Computer Numerical Control Machining）是一种先进的自动化制造技术，通过预编程的计算机指令精确控制机床和工具的运动，从工件上移除 .

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