The fastest rotated speed of principal axis motor of optical disc driver has reached about 12000rpm nowadays.
现今光盘驱动器主轴马达的最高转速约为每分钟12000转。
In Lanchester's design, two balance shafts rotated in opposite directions at twice the crankshaft speed to cancel out the niggling secondary vibrations.
Lanchester的设计中，两个平衡轴以两倍于机轴转速，反向地转动，抵消了无用的次生振动。
In some cameras of this type the drum is rotated at high speed.
在此种类型的某些摄影机中，鼓轮是高速转动着的。
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