A difficulty arises when the point and instrument are not at the same level. 当测点和仪器不在同一水平面上时,工作就会遇到困难。
The gas thermometers with capillaries facilitate separation of the display unit from the measuring point. 带有毛细管的气体温度计把显示单元和测量点分开了。
Owing to the high cost of wiring, most process plants have hundreds or even thousands of discrete measurement points that are not connected to the control system. 由于配线的成本很高,许多过程工厂拥有数百或数千离散测量点,与控制系统相连接。