This standard specifies the test materials and instruments, test methods, test results and test reports for the test method of feed direction stability of household sewing machines when sewing without threading. This standard applies to household sewing machines driven by electric motors, and also to household sewing machines driven by hand or pedal.
GB/T 4517-1995 history
2013GB/T 4517-2013 Household sewing machine.Determination of directional stability
1995GB/T 4517-1995 Household sewing machines--Determination of directional stability