推进器转一圈的距离飞机螺旋桨旋转一次的前移距离，以其与螺旋桨相平行的距离衡量 The distance that a propeller would travel in an ideal medium during one complete revolution, measured parallel to the shaft of the propeller.
翼剖面；机翼；翼面一个部件或平面，如机翼、螺旋桨叶、方向舵等，其形状或方位控制稳定性、方向、抬升、冲击或驱动 A part or surface, such as a wing, propeller blade, or rudder, whose shape and orientation control stability, direction, lift, thrust, or propulsion.
你能把螺旋桨上的草除掉吗？ Can you free the propeller from the weeds?
