Installation of equipment, lines and pipelines in general industrial and public and civil construction projects, 35 kV and below power transformation and distribution station projects, production and installation of non-standard steel components. Mechanical and electrical installation is a relatively large-scale project. For some large-scale enterprise relocations, one project takes nearly six months to implement, and the technical requirements for installation are also quite large. The project content includes boilers, ventilation and air conditioning, refrigeration, electrical, instrumentation, motors, compressor units, radio, film, television broadcast control and other equipment.