The 40 - meter trolley - mounted fog cannon machine is a movable dust control equipment. Usually mounted on a trolley frame, it atomizes water into fine particles through high pressure and can spray up to about 40 meters. It can effectively adsorb dust and particles in the air, suitable for dust control in construction sites, mines, roads and other places. It has the characteristics of strong mobility, wide coverage and high dust control efficiency. Some equipment can also be used with water tanks or external water sources, featuring simple operation and environmental protection and energy saving.