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  • How sump pumps clear subway floods
  • 點閱:1
  • 作者:
  • 出版社:Next Animation Studio
  • 出版年:2011
  • 集叢名:How it works Natural and Social Science Animation.1,機械背後原理
  • 格式:JPG
租期14天 今日租書可閱讀至2020-06-14

The New York City MTA closed the subway system for fear of flooding from Hurricane Irene. Underground sump pumps are activated when pressure sensors detect high water pressure. Impellers in the pumps propel the water into pipes that carry the water back up to ground level. Sources: New York Times, HowStuffWorks

 

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租期14天
今日租書可閱讀至2020-06-14
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