1.Use High accuracy angular transducer,resolution is 0.1mN,can make sure testing error within ±1%,user can use weight to check the equipment indicating value. 2. Inside has the balance staff compensating device,reducing effects caused by friction,make testing reults more stable and accurate.3. Liquid English menu,friendly human-computer interface,can finish testing automatically.Has testing data statistics and disposing function,output testing result with miniprinter,can show and record test result automatically.Can reduce error caused by users,and make sure test result stable and accurate.4. Providing professional calibration weights,has calibration program inside equipment.Enter calibration menu,put calibration weights in the calibration bolts,you can calibrate it directly.