unitized carrier-type axle housing是什么意思

用法例句

The thesis expounds the popular combined arch bridge developed in recent years, and the typies are classified.

论文对近年来日益盛行的组合式拱桥进行了探讨,将组合体系拱桥进行分类,对不同类型的组合体系拱桥的受力特点逐一分析并列举实例。