... about 30-45 days9) Application :petroleum ,Chemical industry , foodstuff ,medical machinery ,smelting ,Aero-space , Shipbuilding ,high pressure boiler ,heat exchanger ,water ... -reading spectrograph, spectrophotometer, CS analyzer, intercrystalline corrosion tester, hydraulic tester, universal testing instrument for material, vortex and ultrasonic fault detection equipment, etc ...