two-stage holdback device 两级锁定机构
stage separation device 级间脱离装置
two stage holdback device 两级锁定机构
over stage mechanical device 台上机械设备
multiple-stage sand removal device 多级除砂装置
multi-stage bubble-generating device 多级气泡发生元件
driving multi-stage anti-erosion device 主动多阶式防磨装置
应用推荐