Sandblast Equipment Used to clean the surface of steel pipe, tube, sheet,plate, etc.to gain bright surface. Sandblast EquipmentUsed to clean the surface of ... Certification. With Professional Test Equipments in our company, we can test electric system and parts in various Voltage and ... Hertz worldwide . The test range is 0 - 600V, 45 - 500HZ. Passed the test, it can ensure our machine working ...