... grating , ISO9001-2000, GRATING SPECIALIST! Mr.David Huang metal grating ,black grating ,black floor grating ,ISO9001-2000, ... in manufacture and export all kinds of steel gratings with the best quality, competitive price and faster ... structures, stair tread, well cover, trench cover, compound gratings, storage shelves, ladder, fences and handrail so on ... -2006, Japan: IS (Mr. David Huang) metal grating