It works on the principle of electro-contact discharge erosion to remove the metal bond of grinding wheel, then to make the wheels dressing or truing.是什么意思_It works on the principle of electro-contact discharge erosion to remove the metal bond of grinding wheel, then to make the wheels dressing or truing.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句