The natural heat expansion center of boiler will change with the change of operation condition.
锅炉的自然热膨胀中心是随着工况的变化而变化的。
2
The center distance of two holes is equal to the center distance of the corresponding venting hole and the water hole of the boiler.
两孔的中心距与相应锅炉通气孔、通水孔的中心距相等；
3
Set up a "boiler component parts processing center" manufacturing A, "Reconstructing the boiler installation and maintenance, " installation and maintenance of A-level.