spent steel pickle liquor

例句：

1. 1. The factory uses spent steel pickleliquor to clean the equipment.
   这家工厂使用废钢酸洗液来清洗设备。
2. 2. Thechemical engineer mixed the spent steel pickleliquor with water to create a solution.
   化学工程师将废钢酸洗液与水混合以制成溶液。
3. 3. The processof using spent steel pickle liquor for cleaning is environmentally friendly.
   使用废钢酸洗液进行清洁的过程是环保的。