... high pressure resistance welding machin Product Name: Steel Grating Steel grating by load flat steel and bars with certain distances, the ... of platforms, walkways, trestle bridge, ditch cover, covers, ladders, fences and railings. Series 1 (pitch 30mm) steel grating is the most ... , it can be used for storage shelves, pavilion panels, trestle, protective fencing, sun screens and so on. Series 3 ...