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By certification 
Belt drive screw air compressor
German belt, with a unique tension control system, is easy to maintain and has longer life and higher efficient transmission compare with other belt which makes drive system more stable and reduce maintenance cost.
Direct drive screw air compressor
Connected with rotor, motor and it’s outer case form a unit which can achieve zero maintenance. Besides, due to less spare parts, direct drive has less transmission loss to make it more stable and get longer life.
