短语词组短語helm a port 左舵put the helm to port 把舵轉曏左舷helm port signal 舵角信號helm port stock 舵柄helm port transon 舵杆孔加強材helm port roof 尖屋頂helm port transom 舵杆孔加強材helm port wind 舵輪風port helm 裡舵 返回 helmport