dabber

1.Dabber: A ball-shaped device filled with cotton or rag in the middle and wrapped with leather of fine cloth .

拓包:一个球状物体，中间或破布，外面用皮或细绒布包着。好评(0

2.The ZSJL Water Motor Alarm consists of a turbine shell, a vane wheel, a transmission shaft, a dabber, a rocker arm, a clapper, an alarm seat and a support shaft etc.

ZSJL型穿墙水力警铃由机壳体、叶、传动轴、芯轴、转臂、铃锤、警铃座、支撑轴等组成。