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low-pressurepipe irrigation
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low-pressurepipe irrigation
Encyclopedia
农学
农业水土工程
释
low-pressurepipe irrigation
低压管道输水灌溉
利用高位水源和缓坡地形落差所提供的自然压力水头或利用低扬程机泵将灌溉水加压(一般压力≤30千帕),再通过低压管道把低压灌溉水输送到田间地头(低压输水管网的最末一级管道出水口工作压力水头一般只需3千帕左右即可),然后利用配套的给水栓进行沟灌或小畦灌的灌溉系统。
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Urysohn
Urysohn-Brouwer lemma
Urysohn closed space
Urysohn equation
Urysohn function
Urysohn lemma
Urysohn metrization theorem
Urysohn operator
Urysohn separation axiom
Urysohn space
Urysohn theorem
Urysohn-Tikhonov theorem
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