Based on advanced roller coating technology, Yatai production technology of aluminum and manganese magnesium roof panel, and can withstand the test of time, close protection to eliminate the effects of weather and finished stand for centuries. Metal roof in the more special buildings such as the low slope, flat, curved, arched roof and hyperbolic design, even more show its merit. Metal roof, the basic material is magnesium manganese alloy, grade 3004 (AI Mn Mg), aluminum metal roof due to 0.7 ~ 1.2mm thick, structural strength is moderate, easy welding bending, in addition to the standard connection technology, vents, entrances, etc., in the field of welding. At the same time in different pressure states, can ensure the integrity of the material, in line with GB3880-97 standard or ASTM3004 standard, it is widely used in the construction of the maintenance system.