上体左、右半壳直焊缝视产品结构不同，分别采用对接熔化焊和搭接缝焊工艺。
According to the different product structure, butt fusion welding process and lap seam welding process are used to respectively weld left and right half shell of upper body.
前言：根据“锅炉压力容器焊工考试规则”规定， 对接缝手工电弧焊的考试试板必须采用单面焊双面成形工艺完成。
As stipulated by"the testing regulation of container of pressure of boiler to welder", the prototype of arc welding to the joined slit must be completed through the crafts of groove by bevelling.
前言：根据“锅炉压力容器焊工考试规则”规定， 对接缝手工电弧焊的考试试板必须采用单面焊双面成形工艺完成。
As stipulated by"the testing regulation of container of pressure of boiler to welder", the prototype of arc welding to the joined slit must be completed through the crafts of groove by bevelling.
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