50GDL12-15×2,50GDL12-15×3,50GDL12-15×4,50GDL12-15×5 50GDL12-15×2,50GDL12-15×3,50GDL12-15×4,50GDL12-15× 無(wú)錫市昌林自動(dòng)化科技有限公司