wielding line的用法和樣例：
例句
- Variations in the properties of the weld occurring at short regular intervals along the weld line due to repetitive variation in welding heat.
由於焊接熱量周期變化，使得沿焊縫線每一固定的小間距焊縫的性能出現周期性變化。 - The research and application of Tailor-welded blanks with curvilinear-weld line is relatively few and its forming regularity is indistinct in this field.
摘要目前對於曲線焊縫拼焊板的研究和應用還比較少，對其成形規律還不清楚。
