将以下语句进行翻译,同时分析句子的语法和句式。 After these initial activities, the major pieces of equipment and the steel superstructure are erected. Heat exchangers, pumps, compressors, piping, instrument sensors, and automatic control valves are installed. Control system wiring and tubing are run between the control room and the plant. Electrical wiring, switches, and transformers are installed for motors to drive pumps and compressors. As the process equipment is being installed, it is the chemical engineer’s job to check that it is all hooked together properly and that each piece works correctly.