... steel pipe, tube, sheet,plate etc.to gain bright surface. Sandblasting Machine ,Used to clean the surface of steel pipe, tube, sheet ... With Professional Test Equipments in our company, we can test electric system and parts in various Voltage and Hertz worldwide . The ... - 600V, 45 - 500HZ. Passed the test, it can ensure our machine working normally under specific power at the User side.Reference ...