qualitative index的用法和樣例：
例句
- The diameter control is one of the important quality index for spiral welded steel pipes.
螺旋焊接鋼管的直徑控制是螺旋焊管生產(chǎn)的重要質(zhì)量指標之一。 - Based on the traditional production techniques, the article introduces improved production techniques and production quality index of Zizhong Mustard Tine.
本文介紹了在傳統生產(chǎn)工藝基礎之上進(jìn)行改進(jìn)了的資中冬尖生產(chǎn)工藝及產(chǎn)品質(zhì)量指標。
