Qingdao Histro Steel Tower Co., Ltd. is an enterprise established in 2001. Now we update the name to Qingdao Sinostro Technology Co.,Ltd and Qingdao Histro Heavy Equipment Co.,Ltd .Our company has the ability of fabricate and building broadcasting television towers, Telecommunication towers, Transmission towers, and structural steel for oil, gas, petrochemical, power generation, refinery, mining equipment, rail transport, and pressurevessel .Our output value was US$500 Million in 2012. ...