[ad_1] Knelson concentrators are used in gold mining to recover fine gold from ore without using gold cyanidation. Developed in 1978, the device uses gravitational force and a liquefaction process to separate particles by density. The machine has led to the growth of Knelson Gravity Solutions, Knelson Milling Solutions, and Knelson Engineering and Manufacturing. The […]
[ad_1] An oxygen concentrator delivers a concentrated flow of oxygen to a patient without relying on oxygen cylinders. It is safer than using oxygen cylinders and can be used on the spot or as a portable device. Patients can rent or purchase the device, and insurance may cover the cost. An oxygen concentrator is a […]
