propellers螺旋辊propellern.螺旋桨；推进器=propellor.propeller open-water test螺旋桨敞水试验propeller-engine matching机桨匹配propeller shaft safety strap螺桨轴安全圈propeller hydraulic cylinder推进器液压缸propeller-type speed meter螺旋桨式速度计propeller shaft splined yoke螺旋桨轴槽轭propeller reinforcing girder螺旋桨加力梁,螺旋桨增强梁Propeller - driven aircraft螺旋桨飞机propeller shaft pinion flange传动轴主动齿轮凸缘propeller feathering solenoid顺桨螺线管