instrument discriminator

例句：

1. 1. The instrument discriminator is usedto identify the type of ink usedfor printing.
   仪器鉴别器用于识别用于印刷的墨水类型。
2. 2. The discriminator wasdesigned to distinguish between different types of materials.
   鉴别器被设计用来区分不同的材料类型。
3. 3.The discriminator was used to testthe accuracy of the printer's settings.
   鉴别器被用来测试打印机设置的准确性。