机械化深松技术
mechanizable deep digging technology
机械深施肥
deep mechanized application of fertilizers
深松机模态试验研究
Modal Experiment about Subsoiler
振动深松机的研究设计
Research and Design of Vibrating Subsoiler
二次机械松弛
secondary mechanical relaxations
上海大松机械有限公司
Shanghai DAISO Machinary Co.
Ltd.
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