At noon on September 8th, 2018, Unit # 2 stopped and entered the dispatching shutdown maintenance stage again. In this period, the maintenance tasks of steam turbine are heavy, except that the auxiliary steam, steam extraction, condenser system, high and low pressure heater systems need to be checked and eliminated, the other more important task is the clearance measurement of the low - pressure cylinder final blades of Unit#2. Since the work involves the unit operation safety of the unit, the professional personnel of the steam turbine attach great importance to this work. On September 25th, after a day of hard work, with the cooperation of the professional personnel of Party A, 22 points of low voltage cylinder electric and regulating terminals were carefully measured and recorded. It was confirmed that the measured data met the requirements of technical specifications and provided a strong technical support for the safe and efficient operation of the equipment.