... 2100mm of one set, including bearings, bearing pedestal, stand column, bolt, and the thickness is 15mm, hardness is 95 ° ± 2 ° ... °, thickness is 20mm, equipped with 113620 bearing and support, arm, spanner positive and negative pressure device two groups. 7. dryer section ... : two Φ 2500 × 2000 dryers, with internal and external machining, surface roughness ≤ 0.4, cylinder surface hardness ...