The watertight flaps of ventilators of tool &spare rooms were not in close position and the access manhole cover not closed watertightly.是什么意思_The watertight flaps of ventilators of tool &spare rooms were not in close position and the access manhole cover not closed watertightly.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句