... assures the good sewing resuits even with the medium weight and non wven material3.cliper-built needle plate assure ... fedd mechanism prevents oil splashapplication:For sewing medium and heavy weight material such as texile leather ,viny1,and various synthetics ... to make all parameters testing of our fabric, such as weight, thickness, air permeability, tensile strength, etc.PROFESSIONAL ENGINEERSTo ...