... the whole machine,to make sure bigger air capacity,higher efficiency,longer lifespan.Bearing (Sweden SKF)Perfect stability,adapting to ... protection class IP54,F class insulation,SKF load bearing,higher efficiency than similar products by 3%-5%.Control Panel (Chinese, ... end,improved the life greatly.Oil Filter (Germany MANN)The efficiency is 20% higher than normal one,filter accuracy up to 9 microns ...