... ,Concrete pump pipe :ST52 concrete pump pipe , 45Mn2 Wear-resistant pipes, Twin wall pipes ,Reducer , tee, .ect.2, the towed concrete pump, Concrete placing boom series.3, Concrete pump ... truck fittings : Wear plate and wear ring, S valves, Concrete pump piston , delivery cylinder,.ect4: Concrete pump clamp : DN80 ...