A new type of bending rotation ultrasonic micro-motor was developed.
研制出一种新型弯曲旋转超声波马达。
2
Cosmic substances (micro) rotation is the inevitability of natural selection, otherwise there would be no concept of time, the universe and even non-existent.
宇宙物质(微观)的旋转是必然性的自然选择，否则就没有时间的概念，宇宙甚至是不存在的。
3
A kind of driving mechanism of micro-robot utilizing the traction force produced by the rotation of screws was studied.