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STSQ8B 8 ton truck crane,Website:http://www.sitongcrane.com, car chassis crane, china crane for sale1.5-section boom with dodecagon cross section makes it have strong bearing capacity, small deformation during lifting operation and wide working range; special slide block, alignment 2.Planetary gear reducer and normally closed brake are adopted in slewing system, spur type slewing ring is driven by the motor, buffer valve is equipped in hydraulic system, which can realized free sliding and sta