Hengshui Denai Railway Equipment Co., Ltd. operates in the following areas: production, processing, sales, installation, and import/export of railway equipment and accessories, waterproof materials, composite materials (SMC) cable channels, instruments and meters, fiberglass products, bridge expansion joints, steel structures, plastic products, metal products, explosion-proof electrical appliances, high-pressure oil pipes, fittings, bridge inspection equipment, and dampers; production, sales, installation, and import/export of bridge supports, construction supports, vibration isolation supports, prestressing anchors, corrugated pipes, noise barriers; installation of traffic management luminous signs and billboards; waterproofing projects: bridge engineering; bridge maintenance; construction labor subcontracting; building demolition; steel structure engineering; railway engineering; road engineering; tunnel engineering; municipal engineering; environmental protection engineering; new...