blowout preventer of three stage packer type
five towers and average pressure three times
impulse three and serial control
Three stage and Seven section Model
three stage charging system
three stage compression
Three stage prevent-control
three stage protective system
back pressure turbine
背压汽机
背压透平机
反压涡轮机
背压机组
背压汽轮机
反压轮机
背压式汽轮机
背压式透平机
背压式
背压机
back pressure turbine with intermediate bleed-off
constant pressure turbine
pressure pressure resistance sensor
relative pressure impulse