Crown-drilling pumping sand:
Dredgers: also known as dredging machinery, Pa Shah, as the name suggests that sand mining tools, mostly for use of mobile operations. Inland river sand mining dredgers daily capacity of hundreds of tons, to thousands of tonnes. Hull assembled using box-type structure. Equipped with excavation means, filtering means, lifting means, transfer means and the like. By motor-driven feeding bucket, stones pass through the screening came from the conveyor belt, the conveyor belt of sand spread to the specified location.
Large river sand mining high degree of mechanization and automation, a dredging ship boat can become a production unit, sand and gravel mining can be implemented separate selection process.