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fixed spray造句

"fixed spray"是什么意思   

例句與造句

  1. The necessary motion spray irrigation powered vehicle composition migration or half fixed spray irrigation unit , use each kind of water source ( well , ditch , river , pond , lake , pond ) carry on the spray irrigation to the size land parcel
    配套移動(dòng)噴灌動(dòng)力車,組成移動(dòng)或半固定噴灌機(jī)組,利用各種水源(井、渠、河、池、湖、溏)對(duì)大小地塊進(jìn)行噴灌。
  2. Based on the analyses of the investment of nozzle tube net and relationship between the annual operation cost and tube diameter function of a fixed spray irrigation system , a mathematic model to calculate the economical tube diameter of a spray irrigation system is developed by using the minimum expense norm and nonlinear planning theory in engineering economic analysis , and a direct calculation formula for the economical tube diameter in unrestrained conditions is presented
    摘要在分析了固定式噴灌系統(tǒng)的管網(wǎng)投資、年運(yùn)行費(fèi)用與管徑函數(shù)關(guān)系的基礎(chǔ)上,利用工程經(jīng)濟(jì)分析中費(fèi)用最小化準(zhǔn)則和非線性規(guī)劃理論,建立了求解噴灌系統(tǒng)管網(wǎng)經(jīng)濟(jì)管徑的數(shù)學(xué)模型,并給出了無約束條件直接求解經(jīng)濟(jì)管徑的計(jì)算式。
  3. It's difficult to find fixed spray in a sentence. 用fixed spray造句挺難的

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