A voltage is applied along the graphene surface as DNA strands are passed slowly through the slit one base at a time.
DNA链按每次一个基本单元的速度缓慢通过，同时沿石墨烯面加上一个电压。
The welding current, arc voltage, preset current, the period and ratio of pulse, base current, down slope time, gas pre and post flow time are sampled, calculated and controlled by microprocessor.
单片机对焊接电流、电弧电压、电流给定、脉冲周期、占空比、基值电流、收弧电流衰减时间、前气和后气时间等焊接参数进行采样、计算和控制。
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