GJT70-34 cementing trailer is the key equipment used for cement mixing and pumping during well cementing service. Various cementing applications of deep well, medium deep well and shallow well at oil-gas field can be realized by it, includes fracturing of shallow well, mixing slurry, injecting slurry, replacing slurry/water, well cleanout and so on. ■ The unit consists of dynamic system, slurry mixing system, hydraulic system, electric system and so on. The key parts of the unit are all imported original which greatly improve the reliability of the equipment. ■ The main instruments and controls of this unit locate at the control console which make the operation more conveniently. ■ The automatic mixing system(AMS) developed by Jereh is adopted to this unit which is simply and reliably to be operated, also the switch between automatic and manual control can be changed freely.