HEBEI ALLLAND STEEL PIPE MANUFACTURING CO., LTD

Hebei Yuantong pipe professional production of diameter 219----3600*6---20 type double-sided submerged arc spi

Hebei Yuantong pipe professional production of diameter 219----3600*6---20 type double-sided submerged arc spi

Hebei Yuantong pipe professional production of diameter 219----3600*6---20 type double-sided submerged arc spi

Hebei Yuantong pipe professional production of diameter 219----3600*6---20 type double-sided submerged arc spi

Hebei Yuantong pipe professional production of diameter 219----3600*6---20 type double-sided submerged arc spi

Hebei Yuantong pipe professional production of diameter 219----3600*6---20 type double-sided submerged arc spi

Hebei Yuantong pipe professional production of diameter 219----3600*6---20 type double-sided submerged arc spi

Hebei Yuantong pipe professional production of diameter 219----3600*6---20 type double-sided submerged arc spi

Hebei Yuantong pipe professional production of diameter 219----3600*6---20 type double-sided submerged arc spi

Hebei Yuantong pipe professional production of diameter 219----3600*6---20 type double-sided submerged arc spi

Hebei Yuantong pipe professional production of diameter 219----3600*6---20 type double-sided submerged arc spi

Hebei Yuantong pipe professional production of diameter 219----3600*6---20 type double-sided submerged arc spi

Hebei Yuantong pipe professional production of diameter 219----3600*6---20 type double-sided submerged arc spi

Hebei Yuantong pipe professional production of diameter 219----3600*6---20 type double-sided submerged arc spi

Hebei Yuantong pipe professional production of diameter 219----3600*6---20 type double-sided submerged arc spi

Hebei Yuantong pipe professional production of diameter 219----3600*6---20 type double-sided submerged arc spi

Hebei Yuantong pipe professional production of diameter 219----3600*6---20 type double-sided submerged arc spi

Hebei Yuantong pipe professional production of diameter 219----3600*6---20 type double-sided submerged arc spi

Hebei Yuantong pipe professional production of diameter 219----3600*6---20 type double-sided submerged arc spi

Hebei Yuantong pipe professional production of diameter 219----3600*6---20 type double-sided submerged arc spi