... 400 Dual Spring Injector and Nozzle Tester Introduce:Our highly efficient injector nozzle tester is made available ... , USA, Tanzania, Indonesia, Singapore, South America and Middle East. Main ButtonA: Internal pressure meterB: ... in clockwise, quantity of air input will be less, and oil input is less as well. Inverse ... when air pressure 7kg, the oil pressure will be 700kg. E: Air switch valve -The air ...