T73 applies to solution heat treatment, after aging to achieve the required mechanical properties and resistance to stress corrosion products index T74 and T73 is defined in the same state. The state is greater than the tensile strength of aluminum alloy swing state T73, T76, but less than the state. T7X2 applicable since the O or F state solution heat treatment, artificial aging treatment, mechanical properties and corrosion resistance can be achieved T7X state product. T81 solution heat treatment applied to aluminum folding table, by about 1% of cold deformation to improve strength aluminum folding doors, and then artificially aged products. T87 applies to solution heat treatment, after cold deformation around 7% increase in strength, and then artificially aged products. Eliminate the stress state in the above TX or TXX or TXXX state code behind add "51" or "510" or "511" or "52" or "54" indicates that experienced stress relief treatment product status codes. Aluminum folding table, aluminum, air-conditioned double benefit provided by the Texas two-Carrier Air Conditioning Equipment Co., Ltd. Carrier Air Conditioning Equipment Co., Texas two (www.slktsb.com) strong, credible, in Dezhou fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the double benefit air conditioning and you hand into the brilliant, for a better future!