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3620*12 spiral welded pipe
DN700, DN400, DN350 anti-corrosion spiral pipe
DN2800, DN2000 anti-corrosion spiral pipe
DN2000 anti-corrosion spiral pipe and fittings
630 direct buried insulation pipe
1400, 800, 700 pile foundation spiral pipe
630 anti-corrosion steel pipe 3000 meters
1220 internal cement mortar external anti-corrosion spiral pipe
1220 spray wrapped insulation pipe
219, 273, 325 anti-corrosion spiral pipes
3640 * 20 anti-corrosion spiral steel pipe
Over 300 tons of 630 anti-corrosion spiral steel pipe
1820, 2420 anti-corrosion spiral pipe
76-377 insulation pipe
325, 820 anti-corrosion spiral pipe
57-529 insulated steel pipe