welded and expansion joint

例句：

1. 1. The engineerdesigned the welded and expansion joints to ensure structural integrity.
   工程师设计了焊接接头和膨胀接头，以确保结构完整性。
2. 2. The constructioncrew carefully installed the welded and expansion joints to preventleaks.
   施工队伍仔细安装焊接接头和膨胀接头，以防止泄漏。
3. 3. The newbridge was constructed with welded andexpansion joints that can withstand heavyloads.
   新桥梁采用了焊接接头和膨胀接头，能够承受重载。