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 LangFang D.S Petroleum PipeLine Engineering Co.,Ltd.

  Adress:Hebei Langfang City, Guang Yang District Shangdu Jinmao Center A-1-402,Hebei 065000, China

  Tel:86-316-2042088

  Fax:86-316-2040788

  E-mail:xzrsb@deshengoil.com.cn