economically technical index

• 经济技术指标

economically technical index的用法和样例：

例句

1. The life-circle is the most important economic and technical index of the bogie.
   摘要转向架寿命是转向架的重要经济技术指标。
2. The technical indexes of the billets have been improved to a higher level.
   铸坯各项技术指标达到较好水平。