... 5pcs),fastering frame(1pcs),oper spanner(1pcs),hexagon spanner(1pcs),power cord(1pcs),spark line(1pcs) and so on Working principle: ... panel adopts two-number display,separately show regulating power and output power;When opening the machine,it has the displaying ... handcraft,such as deep channelnarrow grooveblind holecircle slot and acute angle.When the machine polishs with ultrasonic it can finish ...