不同工艺方法加工的工件具有不同的表面特征和精度特性。
Every machining technique leads to different surface features and precision characteristics.
提出采用一种新的广义延拓逼近法，来实现煤矿通风机高精度特性曲线的拟合。
Represents a new kind of generalized extended interpolation method to realize the high precision fitting of characteristic curve of fan.
因此，迫切需要研究一种新型的具有快速响应和高精度特性的数字比例压力阀。
Therefore, it is an urgent need to develop a new type of high-frequency and high-precision digital proportional pressure valve.
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