这家金属加工厂专门生产汽车零件。

This ___metalwork specializes in producing car parts.

这家工厂专门生产各种精美的金属制品。

This factory specializes in producing various exquisite ___metalwork.

他在金属加工厂工作了十年，掌握了各种金属处理技术。

He worked at the ___metalworks factory for ten years and mastered various metal processing techniques.