If a certain stage or time to send plumber to repair all water pipes were send carpentry check door locks, door and turned, or send an electrician check circuits existence quality issues.

• 如某个阶段或者时间专门派水暖工人去维修上下水管道，派木工检查门锁、拉手以及合页，或者派电工检查电路是否存在质量问题等。