当前学科:船舶动力装置
  • 题目: 单选
    Many sheath-screw davits have markings to indicate the maximum angle to which they should be cranked out. If the angle is exceeded,the davit().

      A . may jam against the stops
      B . will not automatically position the boat at the embarkation station
      C . screw may come out of the sheath
      D . will chafe against the falls and may cause their failure

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