steel machined part 1.material: Q235,20#steel,S/S ... fittings, grating, frame, manhole covers, pump parts, handwheel, valve, flange, bollard, pilingaccessories, counterweight iron, construction machinery parts and ... , grating, frame, manhole covers, pump parts, hand-wheel, valve, flange, bollard, piling accessories, counterweight, iron, construction machinery ... new products each year. steel machined part