The letting characteristic of HC and CO when gasoline engine using carburettor in idle speed, studying the way of administer, a new purify device had been designed.是什么意思_The letting characteristic of HC and CO when gasoline engine using carburettor in idle speed, studying the way of administer, a new purify device had been designed.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句