可调叶片式螺旋浆转子轮
adjustable blade propeller runner
半浸式螺旋桨
surface piercing propeller
partially submerged propeller
半自动棘轮式螺丝刀
semi-automatic ratchet screw driver
长螺旋旋喷水泥土桩
long auger rotary-jet mixing soil-cement pile
垂直式螺旋转子推导流量计
inferential helical rotor vertical pattern flowmeter