There are generally many types of guardrails. At present, the main paint-based iron railings or iron flower railings on the market, but they are generally unevenly painted, easy to rust, and iron flow...
1 The material used in the metal railing project should be Q235 steel in the steel "Carbon Structural Steel" (GB/T 700-1988) and 0Cr18Ni9 in "Stainless Steel" (GB/T 1220-1992) specified in the current...