1) Computer 2) Test 6 electric injectors at the same time 3) Rotational speed range: 0-9950 rpm, Length of stride: 100 rpm 4) Pulse width: 1-20 ms, Length of stride: 0.1 ms 5) Times: 0-9950 times, Length of stride: 100 times 6) System pressure: 0-6.5 bar 7) Computer system control, multiple functions 8) Automatic model automobile working state and measure analysis 9) Atomization and water clock are measured and analysed with clear ocular, convenient to observe 10) Unique ultrasonic wave arranges the liquid device, it is simple and safe to operate