... (20),7.5(25),9(30),10.5(35),12(40)m (ft) Stand load rating:1150,1600,2200,2880kN Design ... power of drawworks.5).The substructures conform to API spec 4F and are used API monogram on themMain parameters:Model no.DZ225/6 ... .5(25)9(30)9(30)10.5(35)12(40)Clear height of drill floor, m(ft)4.77(15 ...