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Aqueous polyurethane is dispersed in water media, which has not only the excellent properties of solvent-borne polyurethane with low temperature resistance, great adhesion, as well as outstanding toughness combined with good flexibility, but also advantages of incombustibility, low odor and environmental iLndliiiess that solvent-borne adhesive has not.

水性聚氨酯以水为分散介质，它不仅具有溶剂型聚氨酯的耐低温、柔韧性好、粘接强度大的优良性能，而且具有不燃、气味小、不污染环境等溶剂型胶粘剂所不具备的优点，因此倍受国内外研究人员的重视。

Not only it has the excellent properties of solvent-borne polyurethane with good low temperature resistance, great adhesion, as well as outstanding toughness combined with good flexibility, but also advantages of innocuity, incombustibility, low odor, environmental friendliness, energy conservation, security, convenient operation processing, and good film-forming breat...

它不仅具有溶剂型聚氨酯耐低温、柔韧性好、粘接强度大的优良性能，还具有无毒、不燃、气味小、不污染环境、节约能源、安全、加工方便、成膜透气性好等优点。

Low industrial concentration is the key issue of steel industry in China,which results in lots of problems such as inconsequence of Chinese steel products structure、low quality、high resources consumption.

产业集中度较低是中国钢铁行业的核心问题，并由此导致了中国钢铁产品结构不合理、档次和质量较低、资源消耗较高等方面的问题。

Since the shield material has characters of high magnetic inductivity with low magnetic saturation intensity and low magnetic inductivity with high magnetic saturation intensity, different material should be used under different circumstances.

究其磁屏蔽材料本身的特性，磁屏蔽材料存在高磁导率、低磁饱和强度和低磁导率、高饱和磁感应强度等特点，因此在不同屏蔽环境下，屏蔽材料的选择亦是不同。

Now days,fluorinated materials are widely used because of their low surface energy,chemical inertness,thermal stability,and low friction coefficient.

含氟聚合物材料具有极低的表面能、良好的拒水拒油和自清洁性、优异的耐热性能和化学稳定性等，在织物整理、功能涂层、航空航天、生物医用以及微电子等领域已得到广泛的应用。

Now there are two models regarding the massive starformation: infall and accretion model as does the low-mass star formation, andthe collision or merging of low- or intermediate-mass stars model.

对于大质量星形成过程目前主要有两个观点：类似于小质量星形成的吸积方式和由中、小质量原恒星并和形成方式。

Results Three patients presenting hypertension, hypokalemia and sexual infantilism had abnormally high levels of ACTH, low levels of cortisol and sex steroids, low levels of 17-hydroxyprogesterone.

结果 3例患者具有典型的高血压、低血钾和性腺功能低下表现，以先证者临床表现更为突出。

The production of high pump inlet temperature, low pressure, low flow is also one of the reasons why.

3生产中立式离心泵入口温度偏高、压力偏低，也是造成流量低的一个原因。

The differences of providing amino acid to kernel of different winter wheatculfivars.93-52 with high protein content in kernel had highest content of amino acid innutrition organs,indicated 93-52 can provide abundance material for protein synthesis ofkernel,namely the source in full,so the content of amino acid in kernel was highest;Compared Lumai21 with Jinanl7,the amino acid content in leaf of Lumai21 was a littlehigher than Jinan17,but the amino acid content in stem、sheath and spike was obviouslylower than Jinan17,also the amount of amino acid restored in nutrition organs was large,the translocation degree was low to kernel,namely the flow was not fluency,which wasthe main reason of low content of amino acid in kernel.

小麦不同品种向籽粒供应氨基酸水平的差异。籽粒蛋白质含量高的93-52各营养器官中的游离氨基酸含量均最高，说明93-52籽粒蛋白质合成所需底物供应充足，即源足，因而其籽粒游离氨基酸含量最高。鲁麦21和济南17相比，鲁麦21叶片中的游离氨基酸含量虽略高于济南17，但茎鞘和穗中的游离氨基酸含量却明显比济南17低，并且在后期鲁麦21营养器官中游离氨基酸滞留的多，向籽粒中的转移程度低，即流不畅，是造成鲁麦21籽粒游离氨基酸含量低的主要原因之一。

The Electrochemical measurement system used to perform DPSV measurement is constructed with two parts, a low-current measurement system consists of low input bias current operational amplifier and a high resolution SAR ADC and a potentialstat consists of high resolution DAC and high current buffer amplifier.

对于差分脉冲伏安溶出测量，我们使用高精度连续逼近寄存器型ADC和低偏置电流运放构成微电流采样系统；使用高精度DAC和高速大电流缓冲放大器构成了恒电位计，在微控制器的控制下组成电化学测量系统。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。