coal-coking process

例句：

1. 1. The coal-coking process is a crucial step in theproduction of high-quality steel.
   煤焦化过程是生产高质量钢材的关键步骤。
2. 2. Thecoal-coking process has been optimizedto reduce emissions and improve efficiency.
   已经对煤焦化过程进行了优化，以减少排放并提高效率。
3. 3. The coal-coking process involvesheating raw coal to high temperaturesto produce gaseous byproducts.
   煤焦化过程涉及将原始煤炭加热到高温以产生气态副产品。