<p align=LEFT> <A HREF="doll4.html"><img src="fig/h3.gif" alt="doll3"></a> It has a speed control system. If the spring winds down too fast, it cannot move gracefully on a tatami mat. Therefore, the systems for slowing down the movement of the spring is the most important part of the whole structure. A watch has the same speed control system as the doll's! Each pawl at both ends of the lever called Tenpu catches dents in the escape wheel alternately so as to turn the escape wheel in the right speed, through which the speed of the whole mechanism is controlled.