1, the reason why the stone is unsalable. There are many needle-like substances produced, and the overall quality of sand and gravel is poor. The deep-seated reason of acupuncture is the use of laminated crushing equipment in the middle crushing stage.

2, improve the stone unsalable. The production line is equipped with impact crushing equipment as medium, and the produced aggregate particles have good shape, basically do not produce needle-like substances, and the aggregate quality is high. It is the most popular aggregate in high-grade engineering construction, and the sales situation is rising.