Vertical shaft impact crusher is also known as sand making machine. It is used to make sand. What is VSI crusher? Why do I need VSI crushers when there is sand in the river and desert? You may have such wonder. Well, first, the existence of VSI impact crushers is to protect environment. As we all know, tapping definitely has bad effect on the nature. Second, natural sand may be smaller than the materials needed. Thus, we need VSI stone crusher to produce sand specially. It can process...