Ningbo Zhongzheng steel grating Co., Ltd is a professional enter prise in R & D, design, steel grating, SMC grating field.With innovative and pragmatic, scientific developing philosophy, following the criterion of ISO9001, it provides steel grating, stair tread, compound steel grating, fiberglass grating, drainage pit/trench cover, railing & stanchion, etc. Its products are widely used in petroleum, chemical industry, environmental protection, power plants, pharmaceutical, printing and dyeing, brewing, water supply and drainage, transportation and other industries...
