manually operated fire resisting door

例句：

1. 1. The manual operation of the fire-resistant door is crucial for emergency evacuation.
   手动操作防火门对于紧急疏散至关重要。
2. 2. The manual operation of the fire-resistant door ensures that only authorized personnel canoperate it.
   手动操作防火门确保只有授权人员可以操作它。
3. 3. The manualoperation of the fire-resistant door is essential for maintaininga safe environment in high-riskareas.
   手动操作防火门对于在高风险区域维持安全环境至关重要。