We has researched and developed QT25,QTZ25,QTZ31.5,QTZ40,QTZ50,QTZ63,QTZ80,QTZ100 and QTZ125 self-elevating tower crane,WL160 hoisting machine,SCD200/200 construction elevator,JS350,JS500 andJS750 compulsory twin shaft mixer and associated concrete and stabilized soil mixing station with Changsha Institute of Construction Machinery of the Ministry of Construction.