... big deformation grip 3.Criteria: ASTM,EN, DIN, yarn testing instrument yarn testing instrument is widely used to test tension ,tear strength ,peeling force ... , etc.in the field of metal ,rubber ,plastic ,nylon ,leather ,shoemaking ,fabric ,insulator ,electric appliance,automobile ,etc.And it is ... with build-in printer, can print the testing date, time, maximum, average and minimum value. yarn ...