drain system meaning in English

排水系统
排水装置
泄水系统

Drain system and remove valve from piping
从管道上排放系统和拆卸阀门。
Discussion of water saving measures in water and drain system of building
附红细胞体分类学研究进展
Easy to fit , can easily be connected to the house draining system
安装容易，可与室内之排水系统连接
Design and application of siphon type roof rainwater draining system
屋面雨水压力流排水系统的设计应用
The drain system of tongchang surface mine in dexing copper mine
德兴铜矿大山选厂碎矿系统分析与技术改造

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