The sound and vibration of the handpiece (drill) bother me.
钻牙器的声音和震动使我感到难受。
Power supply ; Adopt import component, easily handle and offer the safety to the handpiece.
电源控制器：采用进口元器件，操作方便简单，为主机提供安全保障。
Power supply ; Adopt import component, easily handle and offer the safety to the handpiece.
电源控制器：采用进口元器件，操作方便简单，为主机提供安全保障。
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