... and sediment.It is necessary tool for city sanitation department,waste processing company,big factory……,it can help to clean the sewer ... undergroud,clean the sludge in the river around city, it also can help big factory to clean the greasy dirt and waste ... electronic alarm device.Production cycle30-60 daysFOB/DAF/CNF/CIFUSD$Factory PriceUSD$ Tri-axles vacuum sewage tank trailer