... , Bright annealed, Mechanical polishing, electrolytic polishing8. Test: Eddy current, Hydrostatic, Mechanical, Chemical composition analysis, etc.9. ... & Annealed11. Product Application: The products are widely used in fertilizer, petroleum, central-station, boiler, power station, ... analyzer, fully automatic ultrasonic flaw detector, eddy current detecting equipment, water pressure testing equipment, ...