... 100mm 4.ISO9001 Pool Cover GratingPool Cover Grating is made by the world first-class Italian ORSOGRIL equipment ... and latitude order to certain distance .Cross bar is pressed into the bearing bar by high tension ... resistance welding ring which is controlled by computer, So we can produce high ... : 5*5,6*6,8*8mm4. Bar grating is widely used in the platform, corridor, bridge, well ...