as a byproduct of our industry, we produce a river rock the size of 3 to 5 cm square.
Whether used as backfill material or as a building material.

As a byproduct of our industry, we produce a river rock the size of 2 to 3 cm square.
Whether used as backfill material or as a building material.

Through the washing process and quality control, our plant produces high quality natural sand. It has been well tested and has been widely used as building material and casting....