Our company was located in Qingdao China We specialize in Corrugated pipe line and solid wall pipe line We've been doing pipe lines' business for more than 20 years We're not a trading company we've our own factory work shops and machining center We're very professional and we've a good reputation in this industry We've already exported many kinds of pipe lines to VietnamJapan Korea Algeria Russia etc for more than 70 countries Also our engineers have around 20 years working exper ...