model hardener

例句：

1. 1.The model hardener was used to make the plastic parts smoother.
   使用模型硬化剂使塑料部件更光滑。
2. 2. The manufacturer recommends using a model hardener before painting the product.
   制造商建议在涂装产品前使用模型硬化剂。
3. 3.The model hardener is easy to use and effective in improving the quality of the molded products.
   该模型硬化剂易于使用且能有效提高模具制品的质量。