... 4.abrasion:300mm3 5.elongation:300% rubber transmission beltusage:widely used for metallurgy,mine,road,harbor ... the conveyor belt joints a direct impact on the life of a conveyor belt and the smooth transmission lines ... running smoothly. Conveyor belt method of connector commonly ... NN300, NN350, NN400, NN450, NN500, etc. rubber transmission belt