Commonly used stones for roads and bridges are limestone, granite, quartz stone, basalt, river pebble, marble, bluestone, feldspar, etc. Impact crusher, cone crusher, jaw crusher, sand making machine, vibrating screen sand washing machine, etc. are special equipment in the production line of construction.

Mines include coal mines, metal mines, non-metal mines, building materials mines and chemical mines, etc. Mine scale (also called production capacity) is usually expressed in annual or daily production. Annual production is the amount of ore produced each year.

The existing sand making has more coarse particles, high powder content, rough surface and multiple edges and corners. Aowei Machinery conducts special research on the problems in sand making process.