In accordance with HSE requirement, closed draining system connected to the plant waste oil pipes shall be used for level gauges drainage.

根据环保及安全要求，仪表液面计等仪表的排放采用密闭排放方式，接入装置内的污油管道系统。

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The practice of domestic and abroad highway construction and service shows that the damages and the lost of highway service capability have closed relation with subgrade drainage system.

国内外公路建设和运营的实践表明，公路使用性能的衰减与丧失很大程度上与路基地下水和地面水的存在有关。

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Ecological drainage system is referred to following the principles of natural and industrial ecologic system and cycling economic pattern with which substances cycle with closed loop.

生态型排水系统是指遵循自然生态系统和工业生态系统的原则、符合物质闭环流动循环的经济模式。

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