glass rotameter

例句：

1. 1. The glass rotameter isused to measure the temperature of the liquid.
   玻璃转速计用于测量液体的温度。
2. 2. The glassrotameter was calibrated beforeuse.
   使用前，玻璃转速计已经校准。
3. 3.The glass rotameter is a crucialtool for monitoring the flow rate of gases.
   玻璃转速计是监测气体流速的关键工具。