T type groove plate material:cast iron standard:JB/T7949-99 SIZE:3000*6000mm T type groove platematerial:cast ironstandard:JB/T7949-99SIZE:3000 ... ,200*200mmm,400*300mm,500*400mm,etcthe surface is a plate standard equipment used for testing and drawing of work pieces ... of long shape be made at the suface of the plate . Made according to standard JB/T7949-99 T ...