... project imparting superb water tightness, such as the tunnel, the subway, the dam, highway, bridge pier, oil wells, large equipment ... fill dam cracking of the dam body gap;3. The subway or tunnel wall of the grouting reinforcement or mended;4 ... reinforcement;6. Pool, the basement waterproof and grouting;7. Excavation subway, tunnel, mines, some underground engineering and underground when soil filling ...