fitting up短语¹³¹⁶²⁰⁺³ 基本例句 n.装配 Secondly, the fitting up of the suspension system, redesigning of the transmission system, the fortifying of the braking system and some problems now faced of high speed farm tractors are introduced. 介绍了高速拖拉机悬架系统的配置、传动系统的改进、制动系统的强化以及目前所面临的问题等； cnki