도로측구및 횡단용 맨홀뚜껑 400*1000*50~650*1,300*50 http://www.skcast.co.kr 품 목 A B C D E F 최대하중 SD 450x900x50(70) 450 900 50(70) 520 970 60(80) 30톤 SD 400x1000x50(70) 400 1000 50(70) 470 1070 60(80) 30톤 SD 500x1000x50(70) 500 1000 50(70) 570 1070 60(80) 30톤 SD 600x1000x50(70) 600 1000 50(70) 670 1070 60(80) 30톤 SD 550x1100x50(70) 550 1100 50(70) 620 1170 60(80) 3..
