... lathes, φ8m, φ6.3m, φ5m, φ2.5m 8-unit hobbing machines, φ6.3m×18m, φ5 m×15m , φ4.5m×15m, φ4 ... gas shielded are welding equipments, 6-unit roller plate bending machines manufacturing the material with width of 120mm, 90mm, 75mm, 40mm ... . Raw material performance test, chemical element analyzer, ultrasonic flaw detector, X-ray flaw detector and other equipments are adopted to examine strictly ...