未焊透指母材金属未熔化，焊缝金属没有进入接头根部的现象。
... lack of fusion未熔合；未焊透；熔解不足 lack of penetration未焊透 lack of rainfall缺雨，少雨 ...
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结果表明，焊缝存在的未焊透缺陷不影响管道的安全运行。
The results showed the existence of the flaw would not effected the safe operation of the piping.
采用有限元方法对一条含未焊透缺陷的压力管道进行了强度分析与安全评定。
By using finite element method, a pressure piping with incomplete welding flaw was analyzed in strength and assessed in safety.
基于大量计算数据，拟合得出整圈未焊透三通量纲一塑性极限内压工程估算公式。
Based on plenty of account data, engineering estimated formulas for plastic limit internal pressure were fitted for welded pipe branch junction with incomplete penetration along intersecting line.
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