welding conection的用法和樣例：
例句
- The early losing effectiveness causes of the superheater pipe welding joint were investigated and analysed.
針對某電廠異種鋼焊接接頭高溫早期失效的過熱器管件進行了調查研究和失效分析。 - In order to fulfill requirements of welding quality,welding joints groove patterns and processing precision must be ensured.
為滿足焊接質量的要求就必須保證焊接接頭坡口型式和加工精度。
