甘肃省金昌市双兴制品厂,隶属于金川集团有限责任公司镍都实业公司,是生产下水道井盖、井箅的专业厂家。该厂依托金川集团公司的科技力量和本地资源优势,研发出一种以本地矿产为主要原料,承载能力在20-50吨的高强调复合材料“金驼”牌井盖系列产品,其专利号为:98203522.5,具有中华人民共和国国家知识产权局颁发的专利证书,并得到中国进出口质量认证中心的质量认证。该产品广泛应用于市政建设、电信、铁路、天然气管道和通讯管网等处。目前,各大城市多采用铸铁井盖,下水井算,很容易被人盗窃作为废铁变卖。加之铸铁含碳量高、脆性大、承载能力低、易破损等,给市政道路安全埋下不少隐患。都市黑色陷阱所造 Jinchang City, Gansu Province, Shuangxing Products Factory, part of the Jinchuan Group Co., Ltd. are Nickel Industrial Company, is the production of manhole covers, Jingtao professional manufacturers. The plant relies on Jinchuan Group’s scientific and technological strength and local resources, developed a local mineral as the main raw material, carrying capacity of 20-50 tons of high-stressed composite “golden camel ” card covers products, the patent No. 98203522.5, with the patent certificate issued by the State Intellectual Property Office of the People’s Republic of China and obtained the quality certification of China Import and Export Quality Certification Center. The product is widely used in municipal construction, telecommunications, railways, natural gas pipelines and communications pipelines and other places. At present, many cities use cast iron manhole covers and water wells, which can be easily sold as scrap iron by people. Coupled with the high carbon content of cast iron, brittle, low carrying capacity, easy to damage, etc., to the municipal road safety laid a lot of hidden dangers. Urban black trap created