... , human. 2,saving more than 80%. 3, saving manpower by 20%. 4, small size ...... The independent research and development of industrial sewing ... range:200-6000rpmRecommended:JUKI, YAMATO, Pegasus, SIRUBA and domestic brand of sewing machines. Factory instance:Return On Investment(The ... motor, will raise the work efficiency by 10%~25%, if the monthly salary of each sewing worker is CNY2500, then ...