Aluminum alloy material before entering the support structure should provide Zhuoliang certificate product material, and other technical information Test report
Before the material of the support structure of aluminum alloy enters the market, there should be a certificate of conformity of Zhuoliang to provide product materials, product testing reports and other technical information
Before the materials of aluminum alloy supporting structure enter the site, there should be technical data such as the product material certificate, product test report and so on provided by Zhuo Liang