Product advantages:
1. High density, good compression resistance and good impact resistance
2. Good resistance of asymmetrical bedding, available being buried in the mollisol and quicksand
3. Rubber ring connection, easy but no leakage in the joint
4. Smooth interior wall and low friction, high flow capacity
5. Good corrosion resistance and no environment pollution
6. Lightweight, easily transport and install, low construction cost
7. Application: municipal sewage; rainwater discharge; flood waters drainage; irrigation; ventilation for mine and buildings; industrial waste discharge