规格证明标记

例句：

1. 1.The product has a specification marking on the box.
   产品盒子上有规格标记。
2. 2. The manufacturer uses standardized specifications for all their products.
   制造商对所有产品使用标准化规格。
3. 3. The company insists on using only approved specifications for its products.
   公司坚持只使用批准的规格来生产其产品。