... /min, up to 800 pairs per hour; 2.Self-lubricating head device, longer service life; work, low noise, and create a ... in the sewing of awaste of time. 6.Dual-channel head sewn to make socks more solid and smooth 7.Rated ... .The system has machine component testing function. User can do motor ,head andsensor test by this function, It’s very convenient to ...