propellers螺旋辊propellern.螺旋桨；推进器=propellor.propeller performance推进器性能propeller pitch angle桨距角propeller accessories推动机附件propeller anti-icer螺旋桨防冰器propeller coefficient螺旋桨系数propeller drive shaft搅拌器驱动轴,螺旋桨传动轴propeller wake current螺旋桨伴流propeller shaft lining尾轴衬套propeller-blade area螺旋桨叶面积propeller-jet engine螺桨喷气发动机