gas-producer coal tar

例句：

1. 1.The gas-producer is responsible for producing the necessary gases for the process.
   气体产生器负责为该过程产生必要的气体。
2. 2. The gas-producer was designed to produce high-quality natural gas.
   气体产生器被设计用来生产高质量的天然气。
3. 3.The gas-producer is a critical component in the production of liquefied petroleum gas.
   气体产生器是液化石油气生产过程中的一个关键组件。