机械使用率
machinery utilization ratio
板栗剥苞机械化技术
The Technology of Chinese Chestnut Barker
办公室工作机械化
mechanization of office work
半机械化建筑法
semi-mechanized method of building
电机机械式扫描
electromechanical scannig
scanning
electromechanical
发动机机械故障研究
Research on the mechanical failure of the engine
番茄机械化采收的发展
Development of Tomato’s Harvest with Machinery