raw coal inlet

例句：

1. 1. The company's main raw coal import is from Canada.
   该公司的主要原煤进口来自加拿大。
2. 2. The coal mine has a large raw coal inlet.
   煤矿有一个大型的原煤进口。
3. 3. The raw coal inlet is the first step in the coal preparation process.
   原煤进口是煤炭准备过程的第一步。