Hydraulic manhole cover is a new product developed and designed by our company in 20 14 according to the requirements of municipal design institute and construction party, aiming at the common ditch of emerging industries in China. Products are divided into manual hydraulic manhole covers, electric hydraulic manhole covers and intelligent hydraulic manhole covers. The manhole cover is divided into square and round appearance, and the material is welded by ductile iron and high-quality carbon steel. The installation size and material of manhole cover can be customized according to the new requirements of customers.