在建的大型工业装置的外配建设项目及民用公共建设项目的室外,都会涉及到为主体和投用需要而布置的上下水管道、电讯、暖气及交通道路等必建的配套项目;较大公建还设有停车场、绿化带及建筑装饰小品,其量小、琐碎、施工难度较大。从所需项目的工种配合分析,涉及土建、工艺安装、电仪、给排水及防水处理等专 External construction projects of large-scale industrial installations under construction and outdoor use of civil public construction projects will involve necessary auxiliary projects such as upper and lower water pipelines, telecommunications, heating and traffic roads that are arranged for the main and investment needs; It also has parking lots, green belts and architectural decoration pieces, which are small, trivial, and difficult to construct. Analyze the type of work required for the project, including civil engineering, process installation, electric instrument, water supply and drainage, and waterproof treatment.