industrial grade toluene

例句：

1. 1. Thisindustrial-grade toluene is used in the production of plastics.
   这种工业级甲苯用于生产塑料。
2. 2. The chemical engineers carefully mixed the industrial-grade toluene with the other chemicals.
   化学工程师们小心翼翼地将工业级甲苯与其他化学品混合。
3. 3. Due to its high boiling point, industrial-grade toluene is often used as a solvent for cleaning oily surfaces.
   由于其高沸点，工业级甲苯常被用作清洁油渍表面的溶剂。