We suggest that these extra pressure range is because many of the system, especially the water pressure and process control, have pressure peak or continuous pulse.

我们建议的这些额外的压力范围是由于许多的系统，特别是水压和过程控制，有压力尖峰或者连续的脉冲。

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Pulse amplitude modulation (PAM) is one form of the ways, in which it is widely used in the system of communication and control.

脉冲幅度调制波（PAM）是脉冲调制的一种形式，在通信和控制系统中得到广泛应用。

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A kind of the pulse control mode, the drive and motor closed loop, but not to the numerical control system, the feedback device, in a sense, can open loop control called the servo control.

一种采用脉冲控制方式，此种驱动器与电机闭环，但不反馈到数控系统，这种驱动器在某种程度上可称为开环控制的伺服控制。

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