... Technics: Bead removed, Bright annealed, Mechanical polishing, electrolytic polishing8. Test: Eddy current, Hydrostatic, Mechanical, Chemical composition analysis, etc.9 ... equipment, water pressure testing equipment, universal materials testing machine, low temperature and normal temperature impact testing machine, intergranular corrosion testing device, Brinell Rockwell & Vickers hardness tester, ...