当前学科:船舶动力装置
  • 题目: 单选
    The projection on a shaft designed to change circular motion into up and down or back and fore motion is called ().

      A . wheel
      B . crankshaft
      C . running gear
      D . cam

    答案: <查看本题扣1积分>

    查看答案

    答案不对?请尝试站内搜索


推荐知识点: