An AC servo driving system consists of three command forms such as pulse command, speed command and torque command.

交流伺服驱动动系统包括三种指令形式，即脉冲指令，速度指令，转矩指令。

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In the event, Cristobal's command of wind speed proves inadequate and the first batch of poems is carried away from the crowd, sending people scurrying through side streets in pursuit of poetry.

CNN: A deluge in London, but this time it's raining poems

The diaphragm, shutter speed and menu can be changed quickly using the command dial.

ENGADGET: Sigma DP3 Merrill packs a Foveon X3 sensor and a fixed F2.8, 75mm-equivalent lens

But the command in Afghanistan has put in place plans to speed the withdrawal while continuing training, a defense official said.

WSJ: Obama to Draw Down Troops in Afghanistan