Descriptors | Valves, Hydraulic equipment, Liquid valves, Electrically-operated devices, Servosystems, Controllers, Control equipment, Flow regulators, Type testing, Acceptance (approval), Approval testing, Testing conditions, Test equipment, Circuits, Electrical testing, High-voltage tests, Electrical measurement, Pressure testing, Leak tests, Flow measurement, Performance testing, Frequency response, Endurance testing, Errors, Grades (quality) |