正常条件下，在储存、焊接、处置残留物时，钍钨电极的外辐射可以忽略。
External radiation from thoriated tungsten electrodes during storage, welding, or disposal of residues is negligible under normal conditions.
答：钍钨极仍是直流焊最常用的钨电极。但许多人开始避而远之，因为该元素具有放射性。
A: They remain the most common tungsten used in DC applications, but many people are starting to shy away because of the element's radioactivity.
答：钍钨极仍是直流焊最常用的钨电极。但许多人开始避而远之，因为该元素具有放射性。
A: They remain the most common tungsten used in DC applications, but many people are starting to shy away because of the element's radioactivity.
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