Piping service include fire protection piping, chilled process piping, hot water pipings, steam piping, hotvacuum piping, cold vacuum piping. drain water, city water piping etc.
管道工作包含消防管，冷凝水管，热水管，蒸汽管，热真空管，冷真空管，雨水管及城市水管。
2
Wind is a current of air caused by a vacuum caused by hot air rising.
风是由热空气上升产生真空而引起的空气流动。
《柯林斯英汉双解大词典》
3
"I'll come back later on to take away your trash," he promises, as he sets up a portable electric hot plate on the table. He snips open sealed vacuum packs of soup to pour into the hot pot.