rudder-screw 转向推进器

full-rotating rudder screw 全回转舵桨装置

screw-rudder 桨舵

effect of screw and rudder 车舵效应

screw rudder 转向螺旋桨

twin-screw and twin-rudder ship 双车双舵船

twin-screw and triple-rudder ship 双车三舵船

twin-screw and single-rudder ship 双车单舵船

single-screw and single-rudder ship 单车单舵船

twin-screw twin-rudder 双桨双舵