溶よう加か材ざいMeanings1nounfiller metal; filler materialTechnical term used in welding and related processes; refers to the material added to a joint during welding.溶よう接せつには適てき切せつな溶よう加か材ざいを選えらぶ必ひつ要ようがある。It is necessary to choose an appropriate filler metal for welding.