m control of oil, after changing the cylinder, the needle number and needles distance modified completed by keyboard.12、This machine adapt with the professional yarn suction month, to reduce the blocking of yarn suction month. Also this machine have the function that recycle the waste yarn to solve the blocking problem and reduce the wastage of fun.13、All knitting process worked with computer-controlled valve to reduce fraying, that don't affect the performance and increase the maintenance bur