Mechanical temperature control products because there is no display board, so can not directly understand the actual temperature in the hot water tank.

机械式温控的产品因为没有显示板，所以不能直接了解内胆中的热水的实际温度。

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This paper introduces the computer control system in waste water treatment in printing circuit board production and emphasizes the function of PLC in it.

介绍了印刷线路板生产废水治理中的计算机控制系统，重点介绍了P LC在该系统中的作用。

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Its front panel holds screen indicator (OSD) key and water proof touch control board which made administrators could operate it or enter data expediently without any external keyboard and mouse.

它的前面板上带有屏幕显示(osd)键和触摸板鼠标，维护人员可以在不使用任何外部键盘和鼠标的情况下方便的进行操作或输入数据。

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Mr Scott testified in a hearing before Wyoming's water authority, the state board of control, that he had been irrigating all along.

ECONOMIST: Western water rights