DHDZ Laboratory And Inspection Equipment Vernier caliper Impact test machine Metrology microscope Direct reading type spectrometer Dry penetration Protable hardness meter Hydraulic specimen broaching machine Metallographic sampling machine Ultrasonic flaw detector Magnetic particle detector Zwick roell hardness tester Impact specimen notched projector Mechanical multi-tester Digital ultrasonic detector DHDZ Production Process Raw material Heating Ring rolling Mechanical test Machining inspection Drilling Final inspection Warehousing Spectrometer inspection Forging Heat treatment Impact test CNC lathe Drilling inspection Packing Loading Material cutting Forging inspection Heat treatment recording Machining CNC lathe inspection Stamping Pallet packing Delivery