(50N ~ 3000kN ) series 0.3 standard dynamometer working dynamometer, electronic balance, atmospheric pressure gauge verification device, standard weight group, vacuum calibration device, cement soft training measuring device, hammer steel felt, pressure gauge verification Device, spring impact hammer verification device, vibration standard set, rotational speed calibration device, anemometer (wind tunnel), headlamp detector calibration device, refrigerant (nitrogen) leak detector calibration device, portable gas, dust, smoke sampler Comprehensive calibration device, 0.02 grade American Fluke piston pressure gauge, concrete impermeability tester calibration device, door and window physical property testing machine calibration device, mixer calibration device, cement fineness negative pressure sieve analyzer calibration device.