welding neck

例句：

1. 1. The welding neck is the part where the two pieces of metal are joined together.
   焊接颈是两块金属连接在一起的部分。
2. 2. The welding neck was made from a special alloy that would not corrode in the heat.
   焊接颈是由一种特殊合金制成的，不会在高温下腐蚀。
3. 3. The welding neck was tested to ensure it met the required strength and durability standards.
   焊接颈经过测试，以确保它满足所需的强度和耐用性标准。