·The rubber roller controlling by pneumatied device. These limit can be adjusted, guaramtee precision, shorten time.
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By the principle known Processing, the plane guarantee precision machining holes than guarantee the machining precision easy.
由加工工艺原则可知，保证平面的加工精度要比保证孔的加工精度容易。
The proposed first TDMEI absorbing boundary condition could sufficiently exert the virtue of independence of source, reduce calculation and guarantee precision at the same time.
使用一阶TDMEI吸收边界条件可以充分发挥它与激励源无关的优点，减小计算量，同时保证一定的精度。
For high precision gears, gear grinding is a principal way of machining to guarantee precision and quality, gear rejects caused by cracks in gear grinding are common in gear machining.
对高精度齿轮，磨齿加工是保证精度和质量的主要加工方法，由磨齿裂纹引起齿轮报废是加工中常出现的现象。
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