基本解释n.預選流同根派生 preflow相关词英汉例句The power source has such performances as lift starting, DC arc welding, pulse welding, gas preflow, gas postflow, etc. 該電源具有提陞引弧 、直流銲、脈沖銲、提前送氣和延時斷氣等功能。preflow更多例句