当前学科:船舶动力装置
  • 题目: 单选
    The pH value of water in a diesel engine closed cooling water system should be maintained between ().

      A . 60 to75
      B . 80 to 95
      C . 100 to 115
      D . 120 to 135

    答案: <查看本题扣1积分>

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