أنابيب ومواسير فولاذية - الصين

QINHUANGDAO ZHONGYAN MACHINERY CO. LTD.

DURANICE APPLIED MATERIALS (DALIAN) CO.,LTD

CANGZHOU SYNDA STEEL PIPE GROUP

HUNAN GREAT STEEL PIPE CO.,LTD

OTRISH GMBH - SHANGHAI REPRESENTATIVE OFFICE

HANDAN DEQI METAL MACHINE MANUFACTURING CO.,LTD

ZJG JK MACHINERY CO.,LTD.

CHANGZHOU CHENGXIN METAL PRODUCTS CO.,LTD

HEBEI SENHAI PIPELINE CO.,LTD.

SHANDONG LIAOCHENG ZGL METAL MFG CO.,LTD

TIANJIN YOUFA STEEL PIPE GROUP

TIANJIN BINHAI GUANGHAO PIPE FITTING CO. LTD

HENGTONG TUBING CO.,LTD

EATHU CASTING AND FORGING CO., LTD.

TIANJIN PB STEEL PIPE & TUBE CO.,LTD.

BAOSHENG INTERNATIONAL CO., LTD

ZHAOQING CITY FEIHONG MACHINERY & ELECTRICAL CO., LTD

QINGDAO WEFSUN METAL MATERIAL CO LTD

CANGZHOU JUNENG STEEL PIPE CO.,LTD

JIANGSU RONTECH PETROLEUM TECHNOLOGY INCORPORATED COMPANY

DONATO GROUP LIMITED

SHANGHAI SHENHUA STEEL TUBE CO., LTD

ZHEJIANG YINGSHENG STAINLESS STEEL CO.LTD

WENZHOU LONGWAN NANYANG STEEL PIPES FACTORY

HANDAN ZHENGDA STEEL PIPE CO.,LTD

XINYUANTAI STEEL PIPE CO.,LTD

DALIPU OIL COUNTRY TUBULAR GOODS CO.,LTD

JIANGYIN SUNDREAM PRECISION STEEL TUBE CO.,LTD

CNPC BAOJI PETROLEUM STEEL PIPE CO., LTD.

WEIFANG EAST STEEL PIPE CO., LTD