... covering layer of plastic and cloth not less than 3.2 N / mm Full-thickness longitudinal elongation at ... acid, alkali) product implementation of standard HG2297-92. 3. Retardant conveyor belt products implement the standard MT147-95. ... thickness of plastic cover from top to bottom. 3. In accordance with the layer of rubber conveyor ... NN250, NN300, NN350, NN400, NN450, NN500, etc. rubber transporter belt