Sewing Machine HIGH QUALITY,HIGH SPEED, HIGN EFFICIENCY HIGH QUALITY,HIGH SPEED, HIGN EFFICIENCY BM-B111 Purpose: suitable for the sewing of commonSewing ... has very good high-speeddurability, and even under high-speed sewing, it can be operated with low shock, low noise ... to maximally reduce the wrinkle and sewing errors. The status of oil supply of the sewing machine may beobserved through the oil ...