... /1 PHASE /3PHASETaizhou Derui Compressor Co.,Ltd is specialize in producting OIL FREE SCROLL AIR COMPRESSOR.We possesses the most advanced ... series OIL FREE SCROLL AIR COMPRESSOR integrate all the features as the fourth dynasty air compressor:100% oil free, Silent, Clean, Safety, Energy saving, Free ... it almost can be regarded as maintenance-free air compressor. dental compressor oil free scroll type