... is a special design, it essures machine runs quietly under high speed and long time.2.The machine is produce precisely, highly ... spare parts, easy adjust and repair.3.Auto oil circulation system, auto oil feeding detection.4.Double motor design, adapt to ... 2 H.P 2 H.P 2 H.P Rotation Speed 1,300-1,500 rpm 1,300-1,500 rpm ...