technical-pure grade

例句：

1. 1.The technical-pure grade of the product is excellent.
   该产品的技术纯级非常好。
2. 2.The company has developed a new technical-pure grade for its customers.
   该公司为顾客开发了一种新的技术纯级。
3. 3.The technical-pure grade of the product is higher than that of the other brands.
   该产品的技术纯级比其他品牌的产品高。