However, NC devices have high prices and there’re some volatile factors when NC system is under the practical operation, which incumber the testing and operation process.
但数控设备的成本
，
时数控系统在实际运转过程中存在一些不稳定因素，给运行调试
作带来不便。
However, NC devices have high prices and there’re some volatile factors when NC system is under the practical operation, which incumber the testing and operation process.
但数控设备的成本，时数控系统在实际运转过程中存在一些不稳定因素，给运行调试作带来不便。
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