Shanxi Yuansheng Industrial Co., Ltd. (SYI) has served the society for over 10 years with best construction and municipal products. Our main products include: 1) Ductile and grey cast iron manhole covers and gully gratings 2) Ductile iron pipe fittings 3) Flange adaptors and couplings 4) Valves, flanges 5) Street and garden lamps 6) Rainwater gutters and accessories 7) Surface boxes 8) Tree gratings and frames 9) Precise castings 10) Concrete forging anchors 11) Drop fo... ...[More..]