It is not required to explore Class B reserves during the geological exploration stage of mercury deposits. The proportion of C-level reserves should be determined according to the possible construction scale of the mine scale. Concrete Pump Rubber Hose include the wire steel hose and fabric hose ! wire hose usually has 2/4 layers of wire steel, material is natual rubber ,burst pressure is 130bar-200bar, we have sizes DN50-DN150. Fabric hose is usually with the fabric in it, the working pressure is less than the wire steel hose, usually the little sizes are the fabric one, like 2 inch, 3inch. the lengths are so many 1 meter-24meter all we can supply ! My rubber hose inner wall rubber is the integral , will not happened the Inhomogeneous situation, the performance is good , quality is realiable . Concrete Pump Rubber Hose Concrete Punp Rubber Tube,Concrete Pump Flexible Hose,Concrete Pump End Hose Hebei Shengdebaolong International Trading Co.,ltd , https://www.sdblpumpparts.com