基本解释：弧坑
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Finite element analysis for penstock's crater defect;压力钢管弧坑缺陷有限元分析
A great number of T91 steel tubes are applied in 300 MW and 600 MW boiler,but some power plants find crater crack in some of T91 steel tubes in TIG+MIG process, the cause of crater crack is andlized in detail and solution measures are taken in this pape30 0、60 0MW锅炉中大量使用T91钢管 ,而电厂反映T91钢管的TIG +MIG焊口存在弧坑裂纹。
A great number of SA-213 T91 steel tubes are applied in plant power boiler,but some power plants find crater crack in some of SA-213 T91 steel tubes in TIG+MIG process,the cause of crater crack is andlized in detail and solution measures are taken in this paper.电站锅炉中大量使用SA-213 T91钢管,而电厂反映SA-213 T91钢管的TIG+MIG焊口存在弧坑裂纹。
