second clearance angle

例句：

1. 1. The engineer used a laser to measure the second clearance angle of the machine.
   工程师使用激光测量机器的第二次清除角度。
2. 2. During the construction, the team carefully calculated the second clearance angle to ensure safety.
   施工过程中，团队仔细计算了第二次清除角度以确保安全。
3. 3. The second clearance angle is crucial for the stability of the structure.
   第二次清除角度对于结构的稳定性至关重要。