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Terms for subject Ecology containing down | all forms | exact matches only
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crack down on speculation打击非法投机活动
down feed system下分式给水系统指在室内
down feed two pipe system下分式双管系统布置
down flow下降流
down flow下向流
down stream toe坝趾
down washing下沉洗流指部分排出的烟囱烟气有向地面下降的现象
have one's house pulled down and move out拆迁
lay down放下、兴建管线等
order issued to shut down an enterprise责令关闭
run-down pipe破烂管
sand down去光
up-and-down baffling上下绕行式障板