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closed ball是什么意思 closed ball怎么读

闭球
closed ball的相关资料

closed onv.靠近(接近;差不多)

closedadj.关闭的;封闭的;停业的动词close的过去式和过去分词.

closed tube method闭管法

closed thoracotomy闭合胸廓造口术

closed pretopology闭预拓扑

closed-bomb test密闭爆发器实验

closed observation闭合观测

closed-end funds封闭式基金

closed head injury闭锁性头部外伤

closed back volume封闭后腔

closed shop system[电] 闭场制度

closed personality封闭性格

closed ball的用法和样例
  1. Ball is a sphere with a circular channel for gate parts, ball rotation with the stem of the valve action to achieve headstock.
    球阀是用带有圆形通道的球体作启闭件,球体随阀杆转动实现启闭动作的阀门。
字母C开头的缩写
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