Some problems concerned in the process of detecing quality of domestic gas water-heaters, espedally gas leakiness, are briefly discussed in the paper, as well as basic procedures and regulations.是什么意思_Some problems concerned in the process of detecing quality of domestic gas water-heaters, espedally gas leakiness, are briefly discussed in the paper, as well as basic procedures and regulations.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句