电机转子、机床主轴、内燃机曲轴、汽轮机转子、陀螺转子和钟表摆轮等旋转零部件在制造过程中，都需要经过平衡才能平稳正常地运转。
Motor rotor and spindle, crankshaft, turbine rotor, gyro rotor and escapement rotating parts in the manufacturing process, need to go through in order to smooth the normal operation of balance.
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