In CO2 gas metal arc welding, the difficulty hi seam tracking by pendular arc sensor is how to attain the tolerance signal of weld joint.是什么意思_In CO2 gas metal arc welding, the difficulty hi seam tracking by pendular arc sensor is how to attain the tolerance signal of weld joint.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句