1. High bending strength

2. Little linear expansion  conefficient

3. Strong nail holding

4. Moisture proof and easy work

5. Tightt construction and high strength

6. No ratten or decay

7. The produces are suitable for construction of wiaduct and tall frame builiding

8. If used abide by the illustration strictly it can be reused more than 9 times

9. Solve the problems of lacking and rough surface. suitable for watering concrete

10. Different kinds of products have different usage