setback corner joint

例句：

1. 1.The car's engine is a complex setback corner joint.
   这辆车的引擎是一个复杂的折角接头。
2. 2. The engineer carefully inspected the joint to ensure it was secure.
   工程师仔细检查了这个接头，确保它安全。
3. 3.The construction crew worked tirelessly to fix the corner joint that had failed.
   建筑工人不辞辛劳地修复了那个失败的折角接头。