Tellurium is a chemical element with the symbol Te and atomic number 52. It is a brittle, mildly toxic, rare, silver-white metalloid. Tellurium is chemically related to selenium and sulfur, all three of which are chalcogens.
Aluminium coil, with its high corrosion resistance, high plasticity and high thermal conductivity, according to its different density and strength, now is widely used for further processing or prepainting
Round steel refers to a solid strip of steel with a round cross section. Round steel is divided into three types: hot rolling, forging and cold drawing.The specification of hot rolled round steel is 5.5-250 mm.