perforated slag

• 多孔炉渣

perforated slag的用法和样例：

例句

1. Before desulfating molten iron, the slag should be eliminated.
   在对高炉铁水脱硫处理前，要先除去铁水中的炉渣。
2. Millions of tons of slag now go into building roads each year.
   每年有数百万吨炉渣用於铺路。