Luminaires used in the production and operation areas of factories and mines. In addition to the various lightings used in normal environments, industrial and mining lamps include explosion-proof lamps and anti-corrosion lamps used in special environments, as well as industrial and mining lamps for large-scale high-rise buildings. Seamless Steel Pipe,Carbon Seamless Steel Pipe,Astm A106 Seamless Steel Pipe Seamless Steel Pipe Co., Ltd. , http://www.cz-steelpipes.com