major equipment造句

1、Two-high mill is a kind of major equipment for merchant bar production.
二辊轧机是中小型轧钢生产中一种主要的轧制设备。

2、Major equipment and critical utilities and systems, however, require IQ, OQ and PQ.
对主要的设备、关键的公用设施和系统，还需要开展IQ、OQ和PQ。

3、Electric furnace is major equipment of zinc powder reduction smelting.
电炉是锌粉工艺进行还原熔炼的承载设备。