加拿大科明科公司花费7.0亿美元使特累尔铅锌熔炼与精炼厂进行了现代化扩建。从采用先进的披术和先进的工业卫生观点来看,这将保证该厂作为世界上重要有色冶金联合企业之一的地位。由于生产不能中断,要求设计、建设与生产人员之间紧密合作,故该厂扩建工程所遇到的困难比建设一个新的联合企业更多。 Canada’s Commington spent 700 million US dollars on the Thorel lead-zinc smelting and refineries were modernized. This will ensure the plant’s status as one of the world’s key non-ferrous metallurgical conglomerates from the point of view of its advanced technology and advanced industrial hygiene. Since the production can not be interrupted, the close cooperation between design, construction and production personnel is required. Therefore, the plant expansion project encountered more difficulties than the construction of a new joint venture.