coarse indicator

例句：

1. 1. The coarse indicator onthe dial indicates the temperature.
   表盘上的粗指示器显示温度。
2. 2. Coarse indicators areused to measure distance in afield.
   粗指示器用于野外测量距离。
3. 3. The engineer adjusted the coarse indicator tomatch the readings from the thermometer.
   工程师调整粗指示器以匹配温度计的读数。