Use mainly for the production of coal mine scraper conveyor and machine not the middle of the back cover groove M22 Width: 222 Thickness: 20 fixed double length: n × 1210 Material: M510/M540/M565 D15 tank to help steel M15, M18, M22 E19 slot for steel specific model parameters are as follows: D15 width: 150 thickness: 8 fixed double length: n × 1210 M15 width: 150 thickness: 9 fixed double length: n × 1210 M18 width: 180 Thickness: 10 fixed double length Length: n × 1510 E19 width: 190 Thickness: 14 times The length: n × 1510 M22 Width: 222 Thickness: 20 fixed double length: n × 1210 standard, the standard of the People's Republic of China GB/T3414 coal machine hot-rolled Shaped steel the M18 tank steel suppliers, steel scraper ledge, central trough professional supplier