1. Simple in design, small in structure, slidac Transformer adjusts AC voltage to the minute degree continuously throughout the range. Efficient heat dissipation is a special feature. 2. The carbon brush contact does not wear in the frequent voltage adjustments. Since the contact is contiguous, it creates no spark, thus induces no resistance particles to current. 3. The axis handle is made of best synthetic resin to ensure positive insulation against leakage. 4. Best parts and material are used after years' research and experimentation from every aspects. The coils have withstood specifications, and will never burn out. 5. Application: automatic voltage regulator: applying for products testing in industry or schools, related instruments testing. Torque motor controller: applying for...