20#化肥用无缝钢管 GB6479 219X10 4900 20#化肥用无缝钢管 GB6479 219X12 4850 20#化肥用无缝钢管 GB6479 245X8 5000 20#化肥用无缝钢管 GB6479 245X10 5000 20#化肥用无缝钢管 GB6479 273X7 5250
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