Arizona Governor Doug Ducey sent tweets on Wednesday and Thursday offering Arizona as an alternative to California for Uber to test out its self-driving cars.
The driving wheel was driven by a electric spindle, and the cutting speed was controlled by converter governor.
该机床直接用电主轴驱动主动轮带动锯丝运动，由变频调速器控制锯丝的速度。
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The governor of moscow, the proud count rastoptchin, picking up a horse whip, went to the bridge, and fell to shouting and driving on the crowded carts.