9 # I-beam mine, mine I-beam 11, 12 # steel mine support 
 Material: 20mnk Q235 
 Model: 9 # 
 Height: 90mm leg width: 76mm thick waist: 8mm reasonable weight: 17.69kg / m 
 Model: 11 # 
 Height: 110mm wide leg: 90mm thick waist: 9mm management re: 26.05kg / m 
 Model: 12 # 
 Height: 120mm leg width: 95mm thick waist: 11mm Weight management: 31.18kg 
 Each length of 8 meters, 8.5 meters, 9 meters, 9.6 meters, 10 meters, etc., a large quantity can according to customer requirements! 
 A large number of Jining Coal Supply: 9 # 11 # 12 # steel miners, miners, steel, 9, 11 mining I-beam, 12 support mining steel products sold to more than 20 provinces, municipalities and autonomous regions, shelf, model is complete, the quality is forever, no limit services, sincerely welcome new and old friends to inquire and order!