... be choosed stainless,hot galvanizing ,aluminium 2.ISO9001 steel grating for drainage road floorway and wellsteel gratings meshis by ... crossbars according to a certain distance, high-pressure resistance in weft machine on the board, welded by cutting, ... slippery performance is good, Prevent product contamination. Widely used in petroleum chemical industry, power plant,Water, sewage, municipal engineering ...