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1.These make up a complete irrigation-drainage network.
这些（河渠）构成一个完整的排灌系统。收藏指正
2.irrigation and drainage
农田水利收藏指正
3.A long narrow trench or furrow dug in the ground, as for irrigation, drainage, or a boundary line
沟渠，排水沟，水道在地面上狭长的沟渠或细沟，用于灌溉、排水或用作分界线收藏指正
6.pumping irrigation and drainage
机电排灌收藏指正
8.irrigation and drainage pump
排灌用泵收藏指正
9.irrigation and drainage pumping station
排灌泵站收藏指正
10.irrigation and drainage water quality
灌排水质收藏指正
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