fast-freezing slag layer

例句：

1. 1.The fast-freezing slag layer is a critical part of the mining process.
   快速冻结的熔融层是采矿过程的关键部分。
2. 2. The engineers had to work quickly to remove the fast-freezing slag layer before it could harden.
   工程师们必须迅速工作，在熔融层硬化之前将其移除。
3. 3.The team successfully removed the fast-freezing slag layer, revealing a previously hidden vein.
   团队成功地移除了快速凝固的熔融层，露出了一个之前隐藏的矿脉。