2507不锈钢工业无缝管DN65-DN80-DN100酸洗输送面310-321-316L工业焊管DN125-DN150 ¥19.00 2507不锈钢工业无缝管DN165-200酸洗输送面310-321-316L工业焊管DN250-dn300-DN350-DN400 ¥19.00 2507不锈钢工业无缝管DN165-200酸洗输送面310-321-316L工业焊管dn500-DN650-DN700 ¥19.00 铝合金方管6061-6063铝方通矩形管5x5 6*6 8*8 10x10 12x12 13x13 14x14 15x15 ¥30.00 铝合金方管6061-6063铝方通矩形管16x16 17x17 18*18 19*19 20x20 22x22 ¥30.00 铝合金方管6061-6063铝方通矩形管25x25 28x28 30*30 32x32 35x35 38x38 40x40 ¥30.00