After analysing the flight, cooling and undercooled solidification of multistage atomized droplets, this paper adopts Newtonial cooling, highly undercooled heterogeneous nucleation and steadystate continuous growth model to calculate and simulate numerically the thermal history of droplets and effect of main atomization process parameters during multistage atomization. The results indicated that large undercooling occur mainly during later stage of multistage atomization while recalescence and rapid quenching occur mainly during forced cooling stage.

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XRD, 29Si, 27AI MAS NMR, the adsorption of nitrogen at low temperature,129Xe NMR, XPS, IR-TPD, NH3-TPD, the high vacuum volumetric analysis and pulse flow microreaction were used to study the difference in structure and property between the US-SSY zeolites obtained by quick and slow cooling after treating SSY zeolite with steam at high temperature.

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Analyzing the dynamic behavior of dislocations in the deformed metal at high temperature and high strain rate, a new theoretical model of dislocation dynamic behavior is put forward to describe the dynamic recrystallisation mechanism of the weld metal.

采用本文首次提出的測量摩擦界面溫度的半自然熱電偶測溫法，并結(jié)合焊接過程中的急冷凝結(jié)組織分析成人精品视频在线日韩免费观看网站、微區(qū)應(yīng)變速率分析66在线视频免费，以及摩擦扭矩測量等相關(guān)實驗方法，測定了焊接過程中焊合區(qū)金屬的組織及相應(yīng)的熱變形參數(shù)六六色色。

Andean：安第斯(Andes)山脈的, 安第斯人

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infraorbital canal：眶下管

側(cè)線幾平直,沿體側(cè)中部向后延伸,約至尾鰭下葉前方的1/3處急轉(zhuǎn)下彎至尾端;頭部眶上管(supraorbital canal),前方微彎,至眼前上方則幾近平直而延伸至吻端;眶下管(infraorbital canal)呈波狀,向前延伸至吻前方與眶上管相接,

treat others well when you have your days,because you need them when you are unfortune：得意時應(yīng)善待他人,因為你失意時會需要他們

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