博盈特焊：国内的HRSG生产线布局在公司的大凹生产基地

Group 1 - The core viewpoint of the article is that 博盈特焊 (Boyin Special Welding) is currently constructing its HRSG production line at the 大凹 (Daya) production base, which is not yet open for on-site research [1] Group 2 - The 大凹 production base is still under construction and therefore does not accept on-site visits for research purposes [1]