单列向心推力球轴承single-row radial thrust ball bearing
单列滚珠轴承single-row ball bearing
单列向心轴承single-row centripetal bearing
单列辐射式发动机single-row radial engine【动力】
自动单行收割机automatic single-row harvester
单排星形发动机single-row radial engine
单列球轴承single-row ball-bearing【机】
单列圆盘耙single-row disc-harrow