H-coal process

例句：

1. 1.The H-coal process is acrucial step in the production of clean energy.
   煤炭加工过程是生产清洁能源的关键步骤。
2. 2.The H-coal process involves removingimpurities from raw coal to producehigh-quality coal.
   煤炭加工过程涉及从原煤中去除杂质，以生产高质量煤炭。
3. 3. The H-coalprocess has been optimized to reduce emissions andimprove efficiency.
   煤炭加工过程已经优化，以减少排放并提高效率。