During welding, dial indicator should be set up at the four corners and the split surface of the cylinder platen, and special personnel should be assigned to monitor the deformation and displacement of the four corners of the platen. When the change is greater than 0.10 mm, the welding shall be stopped temporarily, and the welding shall be continued after the normal state is restored. Meanwhile, the rotor lift change value shall be monitored. When the change reaches 0.02mm/m, the welding shall be stopped temporarily, and the full-time commander shall be asked to find out the cause, and then the welding shall be conducted after the deformation recovery.<br>
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