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
纺纱机械机构
mechanism of spinning frame
风机机械特性曲线
mechanical characteristic curve of fan
封闭式水力机械模型试验台
closed testing stand for hydraulic machinery model
工程机械机群
engineering machinery cluster
Engineering Machine-group
国产机械模具
domestic extruder and die
机械模拟计算机
mechanical analog computer