当前学科:船舶动力装置
  • 题目: 单选
    As to the piston cooling, of the following, which statement is not true?()

      A . Because the piston is exposed to very high temperature, it must be cooled
      B . The lower the piston cooling temperature is, the better it is
      C . Both water and lube oil can be used as coolant
      D . One of the piston cooling methods is vibration cooling, with better effect

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