左螺旋桨 left handed propeller ; [航] left-hand airscrew

左旋螺旋桨 left-handed propeller ; left hand propeller ; left handed screw ; left-hand airscrew

左转螺旋桨 propeller left-hand ; Left Hand Propeller ; left-hand propeller

左侧螺旋桨 left screw

左舷放桨 Down oars port

左舷桨 portside oar

右旋/左旋螺旋桨 Right-hand/left-hand propeller

左舷划桨 port stroke