Schedule 4 [J101p-04] Suppression Effect of Frictional Vibration in Electric Tools by Dynamic Absorber 〇Kota Katsuki1, Yasuhiro Bonkobara1, Shunsuke Nakano1, Takayuki Hamahata1 (1. 宮崎大学) Keywords:Self-exited vibration、Vibration control、Dynamic absorber、Sander、Hand arm Vibration