automatic welding prototype machine 自动焊接试验样机
With ultrasonic plastic welding, ultrasonic metal welding, resistance welding prototype and so on.
备有超声波塑料焊接，超声波金属焊接，电阻焊接样机等。
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。
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