submain sewer

submain sewer: канализационный коллектор второго порядка; внутриквартальный коллектор

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submain — ˈ ̷ ̷+ˌ noun Etymology: sub + main : a main (as in a sewer, gas, electrical, or drainage system) having a number of lesser mains feeding into or branching from it but being itself subsidiary to a larger main … Useful english dictionary
irrigation and drainage — ▪ agriculture Introduction artificial application of water to land and artificial removal of excess water from land, respectively. Some land requires irrigation or drainage before it is possible to use it for any agricultural production; other… … Universalium

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