Signs and signs are the in月歌structions of public places. T吧子hey are used to identify contents and p海街ositions in the form of很姐 words, graphics and s可爸ymbols. With the development水上 of economy, signs and signs are wide雜現ly used in life. They are divid紙醫ed into many kinds of mat醫地erials: smooth signs, lum綠但inous materials, acryl房呢ic materials, metal, electric light boa章市rd, etc. The advertis一空ing industry is maintaining a fairly hi店子gh growth rate
