#4炉主蒸汽取样一次门前仪表管管座角焊缝裂纹原因分析及处理
#4로주증기취양일차문전의표관관좌각한봉렬문원인분석급처리
Aanalysis and precautive measure for cracks of fillet welding on the tube socket of 4# furnace
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