Today's world economy is developing rapidly, and competition in various industries has become more intense. In order to reduce labor costs, increase production efficiency, and improve product quality, all industries are working hard to win.Among them, the improvement and quality of the product manufacturing process are the most important, and the screening and grading of raw materials involved in the quality improvement process is particularly critical.Since Laosong Machinery Co., Ltd. was founded in 1975, the vibrating screening filters produced by Laosong Machinery Co., Ltd. have maintained the same concept and mentality, and have been continuously researched and developed. The sales volume of various models has reached hundreds of thousands, and is highly recognized by all walks of life. Our company's designs have been awarded patents in many countries and regions.......