drain period

例句：

1. 1. During the drain period, we need to ensure that all equipment is properly disassembled and stored.
   在排空期，我们需要确保所有设备都正确拆解并妥善存放。
2. 2. The drain period is critical for maintaining the cleanliness of the water system.
   排水期对于保持水系统清洁至关重要。
3. 3. During the drain period, we should also monitor the pressure gauge to ensure that the system is operating within safe limits.
   在排水期，我们还应该监控压力表，以确保系统运行在安全范围内。