Before recycling the gearbox/speed variatator/belvel gearbox the lubricant must be drained out keeping in mind that dirty oil is highly polluting.是什么意思_Before recycling the gearbox/speed variatator/belvel gearbox the lubricant must be drained out keeping in mind that dirty oil is highly polluting.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句