waste gas of coal pulverization

例句：

1. 1. The factory isusing a new technology to reduce the wastegas of coal pulverization.
   该工厂正在使用新技术来减少煤炭粉碎的废气。
2. 2. The pollution from coal pulverization has become a major concern for environmentalprotection.
   煤炭粉碎产生的污染已成为环境保护的主要问题。
3. 3.To improve energy efficiency, we need tofind ways to reduce the waste gas ofcoal pulverization.
   为了提高能源效率，我们需要找到减少煤炭粉碎废气的方法。