1. low cost 2. high quality 3. easy to operate The main ... consisting of pyramid tube, staircase diffuser, distributing roller and box body. Staircase diffusion orifice plate pulp ... which made of organic glass and upper and lower lip plates made of stainless steel. The ... box, and vacuum water-absorbing box, vacuum roller, wire-driving roller, electrical wire-tighter, pneumatic corrector, constant-tension ...