S-serrated Steel Grating bearing bar pitch:12.5-100mm cross ... 25*3mm,30*3mm,30*5mm,50*5mm... S-serrated Steel GratingSteel Grating is used in power plants,chemical plants ... ,oil refinery,iron or steel works,machine factories,paper mill,cement mills,medicine plants ... style(may be committed in the symbol of steel grating)S-serrated styleI-I-section style4)Sign of surface- ...