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QTZ50(5008)construction tower crane All of construction tower cranes are incorporated with internationally advanced "Tower Crane Computerized Design Platform(TCDP)" optimized design,featuring in advanced mechanism, uniform load bearing,good appearance,superior performance and complete,reliable safety devices. Load-lifting height(m): 30~120 Max lifting capacity(t): 2~4 Load-lifting speed(m/min):63/31.5/8.7 Slewing speed(r/min): 0.7 Derricking speed(m/min):33/22 Telescoping speed(m/min): 0.4 Classis frame(m): 6*6 Standard section External size(m): 1.5*1.5*2.2（1.6*1.6*2.5） Main limb size(mm): ∠160*12 Necessary electric power(kw): 20.9 Slowest transquilization lowering speed(m/min): ≤7 Working temperature(℃): -20~+40 Main supply(50Hz):~380V±10%
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