91绿帽人妻精品网站_碰在线视频免费播放_午夜免费国产福利_人妻系列影片无码专_特黄特色无码高清视频_久久久综合结合狠狠狠97色_中文字幕无线观看在_亚洲欧洲成人网_国产男女插插一级_韩国福利一区二区三区

Using the steel grating to design manufacture, surface hot galvanizing, being tidy and beautiful, high strength, corrosion and durable, concise construction, free paint maintenance. Used in power plant, railway, expess highway, sewage treatment, tap water, mines, iron and steel, petrochemisiry airport, dock, and all kinds of industrial and civil architecture.

Steel grating bearing bar section size: 32 x 5 mm, bearing bar pitch 90 mm. cross pitch 400 mm and 100 mm combination.

Also can use other specifications of the steel grating.

Collumn type: C experesse s square steel collmun omit expresses to building cement column in site.

Oband type: B expresses steel grating oband, no band.

Surface treatment: G expresses hot galvanization, omit expresses not to make any treatment.