Note that after the mortar pump work items: 1 after use of a multi-function rig much money, pumps and pipes must be cleaned, can not stay more than ash. 2. Clean the multi-function rig sale price, with special attention ball valve at the mortar should be clean multi-function rig pictures to ensure valve to work properly. 3. The ball valve or piston found broken or worn and should be replaced. Small rig Scope: jet grouting pile, foundation bolt holes, pneumatic DTH hammer drilling and other construction process for the city foundation reinforcement, mine broken hole, railway, highway tunnel pipe roof hole, bolt holes, drainage holes construction.