Dong jing city crown machinery co. Ltd. Is a high-technology enterprise with dual (multiple) group fluid control equipment developed, produced, sold and served as one. The company's name, “down-up” is taken from the tune of “impression”, not only in line with the industry in which it works, but also in line with the goal of all of its employees' determination to “build a super-capable quality product to make the world proud of china's intelligence!”。