... is 1Kv3.3 Tube current: 0.1~10mA(big focus) 0.1~2.8mA(small focus)Adjust ... 0mm(small focus) (EN12543)3.0×3.0 (big focus) 0.4×0.4mm(small focus)(IEC336)3. ... most advanced in the world at present, 5.7”big screen back light display board, Chinese interface, man-machine dialogue ... switch, smooth surface display, easy to operate.Controller screen displays current working parameters in digital mode, and all ...