inspection hole of ceiling

例句：

1. 1.The inspection hole of the ceiling is a crucial part of the maintenance process.
   天花板的检查孔是维护过程中至关重要的部分。
2. 2. The technician carefully inspected the inspection hole of the ceiling before repairing it.
   技术员在修理前仔细检查了天花板的检查孔。
3. 3.The old house had several inspection holes in its ceiling, which were used for ventilation.
   这所老房子的天花板有几个检查孔，用于通风。