1) An independent unit of its own, mounted on a prepared root-plate, all the valves and affiliated parts subject to the food-grade standard.是什么意思_1) An independent unit of its own, mounted on a prepared root-plate, all the valves and affiliated parts subject to the food-grade standard.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句