... rust-removing and reinforcing; corrosion protection in gates of bridges and irrigation works; rustproof, de-oxidation, and paint ... hose; rubber hose for waterway desilting, cementing pump truck, concrete, grout, sediment, coal injection truck, bulk cement truck, ... sand, steel shot, sediment, ball bearing, cement powder, cement concrete, dry powder mortar, coal fines, carbon powder, and mineral ...