The design method of irrigation pipe flow meter is presented and high precise sensor is chosen.

给出智能灌溉管道流量计的设计方法，以及高精度传感器的选择。

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A mathematical model whose variable is water head can simulate the effects of water head and properties of subsurface irrigation pipe on irrigation.

以压力水头为因变量的数学模型可以模拟供水压力和灌水器特性对灌溉效果的影响。

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Study on the basic seepage laws under different working heads, with zippered plastic pipes as percolation irrigation pipe embedded at different depths underground in the shelf.

采用拉链式塑料管作为渗灌管，在大棚中埋于地下不同深度，在不同工作水头下进行了基本渗流规律的试验研究。

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This somewhat dangerous device had a six foot barrel, was made out of PVC irrigation pipe of varying diameters, and was powered by compressed air.

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