能量转换片是由压电陶瓷材料制成的（而不是任何机械振动或电机）。
The transducer is made of piezoelectric ceramic material, it is different from physical vibration and motor vibration.
工艺流程要求调速或定位控制的低压电机采用变频调速，制动。
Process control requirements of the position or speed low voltage motors using VVVF, the brake.
工艺流程要求调速或定位控制的低压电机采用变频调速，制动。
Process control requirements of the position or speed low voltage motors using VVVF, the brake.
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