... drain,floor drain ISO9001 Steel Bar Grating Material:steel grating is made of low carbon steel plate,stainless steel plate,flat steel plate,etc Technique:steel grating is made by ... ,15,25,30,40,60 mm etcCross bar picth:38,50,76,100 mmChina standard: G203/30/100,G203/40/100,G325 ...