... process. At the intersection point of flat steel and horizontal pole, press horizontal pole into loading flat steel, then fixed it. Sometimes ... , 50mm, 100mm.Size of horizontal pole: 10x2mm, the center space : 50mm, 100mm.Type of press-locked steel bar grating: Common ... windows(well), advertising plaque, various cover plate, etc. hot-dipped galvanized pressure locked grating with ISO certificate