听音杆、检漏仪和相关仪等设备的优化使用，加之合理的检漏程序，提高了地下输水管道漏点检测准确率。
The optimal application of sound pole, leak detector and correlator supported by leak detection program have improved the accuracy of leak detection of underground water pipelines.
金属给水管道老化会使管道的输水能力降低、故障率增高和水质变坏。
The ageing of water supply pipe may lead to decrease of water conveyance capacity, higher fault rate and deterioration of water quality.
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