通过工程师的设计，这款推进器同样能够让直升机完美地进行减速，也能通过装配遥控装置驾驶仪让控制X2的飞行更为容易。
According to the engineers, this propeller can also be used to slow the helicopter snappily. And computerised "fly-by-wire" controls allow the X2 to be flown relatively easily.
定心偏差仪就是在井下现场不拆分设备的情况下测量电机轴与减速器高速轴的径向偏差值与倾斜偏差值，确定对设备的调整方法。
Make with the centre device is a kind of device that measure radial and bias amout of deflection to not demolish equipment, define adjusting way for equipment.
球面栅静电减速谱仪具有后聚焦系统。
This method includes an electrostatic spherical grid retarding spectrometer with a post focusing system.
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