螺栓 luóshuān bolt; bolted; bolts

螺丝 luósī screw; screws

螺纹 luówén threaded

螺旋 luóxuán helical; helix; screw; spiral; spirals

螺柱 luózhù stud; studs

田螺 tiánluó river snail

陀螺 tuóluó gyroscopic

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