buried scraper coal-feeder

例句：

1. 1. The buried scraper coal-feeder is essential for the operation of the power plant.
   埋藏式刮煤机是发电厂运行不可或缺的设备。
2. 2. The buried scraper coal-feeder has been upgraded to improve efficiency and reduce maintenance costs.
   升级后的埋藏式刮煤机提高了效率并降低了维护成本。
3. 3. The buried scraper coal-feeder is responsible for removing dust and other impurities fromthe coal before it is fed into the furnace.
   埋藏式刮煤机负责在将煤炭送入炉膛之前，去除煤炭中的灰尘和其他杂质。