... SystemGeneral Introduction 1, Our automatic hysteresigraph system (DMT-4) conforms to the standard permanent magnet test system (GB3217-92). 2, It is ... , Hk and so on, and could meet different requirements on test function, precision, power capability, reliability, efficiency, price, local ... graph and form. There are Chinese or English character, system of unit, single picture or multi-picture to be ...