Theinstrument is designed based on electromagnetic theory and principle of equilibrium in mechanics and composed of a timer, a current regulator and meter, control circuits and two-arm pinchers.
该仪器是根据电磁理论和力学平衡原理设计的，由定时器、电流调节器和电流表、控制电路及电磁夹具所组成。
Theinstrument is designed based on electromagnetic theory and principle of equilibrium in mechanics and composed of a timer, a current regulator and meter, control circuits and two-arm pinchers.
该仪器是根据电磁理论和力学平衡原理设计的，由定时器、电流调节器和电流表、控制电路及电磁夹具所组成。
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