... ,easy to operate (2)high quality, competitive price (3) ISO9001:2000 , (4)CE ,GOST We are Jinan huifeng keda trade ... at jib tip(t)31.51.31.3 Hoisting speed (m/min)a=2 80/40, 100/50/ ... 39.37/20.11 a=4 Radius changing speed(m/min)55/27/1958/29/844/22 Swiveling ... speed(r/min)0.60.630.6 Climbing speed(m/min)0.450.40. ... 1450/1380 tower crane with good applicability with ISO9001:2000