To study one unit repairable system with single repairman vacation, a kind of new maintenance and replacement model is proposed.
针对修理工带有单重休假的单部件可修系统，提出了一种新的维修更换模型。
A revolving system on each grinding unit allows on-the-move exchange between four rows of grinding stones, putting a replacement set of grinding stones onto the rails whenever one set is used up.
每个打磨单元中的循环系统使四列磨石在移动中交换，一组用完马上更换另外一组磨石。
The system has been engineered as a direct replacement for the stock unit, requiring only minor modifications for a clean, factory-like installation.
该系统已被设计为一个单位的股票，需要直接更换一个干净，工厂只有细微的修改，例如安装。
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