push
... 下推自动机 Push-Down Automata, PDA 下压 push 先行词 antecedent ...
steam blowing
... 卸粕 meal discharging 下压 steam blowing 环形浸出器 loop type extractor ...
underdraught
... underdrainagesystem地下排水系统 underdraught下压 underdrive下传动 低档 传动迟缓 ...
downward pressure
... 洗井 Clean out of well / well flushing 下压 downward pressure 下钻 tripping ...