26,000 tons/year supervision project of the second phase of mine reconstruction and expansion project. Qualification requirements of bidders: (1) Bidders of mine tunnel projects must have the second-class qualification of general contracting of mine construction projects ... Website email slmzx1982 @163.com Address: No.62 Cuixi Road, Haidian District Network Real name: China Floor Heating Network 50 130600. ...