1.High Sewing Speed 2.Low noise and maintenance rate 3.High ... to 3900r/min, up to 800 pairs per hour;2.Self-lubricating head device, longer service life; work, ... automatic trimming device, effectively control the length of uniform socks, cut sutures, unity.4.Can be flipped into the ... in automatic lifting device , the more smooth delivery of socks.5.Feed fiber optic sensor time delay function, the ...