propane reflux

例句：

1. 1.The propane reflux reactor is a key component in the production of olefins.
   丙烷回流反应器是生产烯烃的关键组件。
2. 2. During the propane reflux process, the temperature and pressure must be carefully controlled.
   在丙烷回流过程中，温度和压力必须小心控制。
3. 3.The propane reflux system was designed to improve the efficiency of the chemical reaction.
   丙烷回流系统被设计用来提高化学反应的效率。