The bridge type water filter is a water filter device with a bridge hole. It has long been widely used in developed countries. In the 1980s, the Ministry of Geology and Mineral Resources began to introduce and promote and achieved satisfactory results. It was praised as the "ideal well filter". Mainly engaged in hydrogeological exploration, drilling, well construction, reservoir precipitation, foundation deep dredging, geothermal development and utilization, development and utilization of mineral water, ground temperature air conditioning, repair of bad wells, groundwater source water intake.