571. 机械设计 Mechanical Designing
572. 机械设计基础 Basis of Mechanical Designing
573. 机械设计课程设计 Course Exercise in Mechanical Design
574. 机械设计原理 Principle of Mechanical Designing
575. 机械式信息传输机构 Mechanical Information Transmission Device
576. 机械原理 Principle of Mechanics
577. 机械原理和机械零件 Mechanism & Machinery
578. 机械原理及机械设计 Mechanical Designing
579. 机械原理及应用 Mechanical Principle & Mechanical Applications
580. 机械原理课程设计 Course Exercise of Mechanical Principle
