Vacuum Suction Semi-trailer 1.6x4 Combination suction-flushing vehicle 2.Various color and OEM are accepted. Vacuum Suction Semi-trailer 1.Fuctions and Features*Suitable for suction,transportion and dumping soil and mud from various sewer ,wells large-scale factories and mines*Also used as slit remover for cleaning rills and rivers. *Greatly reduce the risk and workload *Combining with remote ...