أنابيب ومواسير فولاذية - الصين

QINHUANGDAO ZHONGYAN MACHINERY CO. LTD.

CANGZHOU SYNDA STEEL PIPE GROUP

DURANICE APPLIED MATERIALS (DALIAN) CO.,LTD

HANDAN DEQI METAL MACHINE MANUFACTURING CO.,LTD

OTRISH GMBH - SHANGHAI REPRESENTATIVE OFFICE

HUNAN GREAT STEEL PIPE CO.,LTD

HENGTONG TUBING CO.,LTD

TIANJIN YOUFA STEEL PIPE GROUP

CHANGZHOU CHENGXIN METAL PRODUCTS CO.,LTD

TIANJIN BINHAI GUANGHAO PIPE FITTING CO. LTD

SHANDONG LIAOCHENG ZGL METAL MFG CO.,LTD

HEBEI SENHAI PIPELINE CO.,LTD.

BAOSHENG INTERNATIONAL CO., LTD

TIANJIN PB STEEL PIPE & TUBE CO.,LTD.

ZJG JK MACHINERY CO.,LTD.

EATHU CASTING AND FORGING CO., LTD.

ZHAOQING CITY FEIHONG MACHINERY & ELECTRICAL CO., LTD

BEIJING SHENGSHIHUANENG INTERNATIONAL TRADE CO.,LTD

WEIFANG EAST STEEL PIPE CO., LTD

HANDAN ZHENGDA STEEL PIPE CO.,LTD

DONATO GROUP LIMITED

SHANGHAI SHENHUA STEEL TUBE CO., LTD

JIANGYIN SUNDREAM PRECISION STEEL TUBE CO.,LTD

CNPC BAOJI PETROLEUM STEEL PIPE CO., LTD.

ZHONGYOU TIPO GROUP INTERNATIONAL SALES CO.,LTD

CANGZHOU JUNENG STEEL PIPE CO.,LTD

QINGDAO WEFSUN METAL MATERIAL CO LTD

SHANDONG JIANNING METALS CO.,LTD

XINYUANTAI STEEL PIPE CO.,LTD

CHANGZHOU TONGCHUANG TUBE INDUSTRY CO.,LTD