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Methods: 2ethyl aniline was used as starting material of the synthesis and was processed by acetic anhydride acylation, strong nitric acid nitraction at low temperature, and desacyl synthesis to produce 2ethyl5nitro aniline. The product was then synthesized to 3methyl6nitro1Hindazole by using ringclosing reaction in the presence of NaNO2, and then ethylated to obtain 2,3diethyl6 nitro2Hindazole. The latter compound was then reduced by SnCl2/Hcl to get target compound 2,3diethyl6nitro2Hindazole.

以2乙基苯胺为原料经醋酐酰化、浓硝酸低温硝化及去酰基保护合成2乙基5硝基苯胺，后用亚硝酸钠关环得3甲基6硝基1H吲唑，经硫酸二甲酯甲基化得2，3二甲基6硝基2H吲唑，最后用氯化亚锡将其还原得到目标产物，通过1H NMR确定结构与目标产物一致。

Methods: 2-ethyl aniline was used as starting material of the synthesis and was processed by acetic anhydride acylation, strong nitric acid nitraction at low temperature, and desacyl synthesis to produce 2-ethyl-5-nitro aniline. The product was then synthesized to 3-methyl-6-nitro-lH-indazole by using ring-closing reaction in the presence of NaNO2, and then ethylated to obtain 2, 3-diethyl-6- nitro-2H-indazole. The latter compound was then reduced by SnC12/Hcl to get target compound 2, 3-diethyl-6-nitro-2H-indazole.

以2-乙基苯胺为原料经醋酐酰化、浓硝酸低温硝化及去酰基保护合成2-乙基－5-硝基苯胺，后用亚硝酸钠关环得3-甲基－6-硝基－1H-吲唑，经硫酸二甲酯甲基化得2，3-二甲基－6-硝基－2H-吲唑，最后用氯化亚锡将其还原得到目标产物，通过1HNMR确定结构与目标产物一致。

Therefore, the author excogitates some synthesis courses of new compounds including selenium and aspirin based on medicament chemistry and coalition principle. The new compound is named 5-5'-diselenium monoacetyl salicylic acid and ascertained by IR ,UV and MALDI-TOF-MS, and its structure is: OOHThe compound is inhibiting to sarcoma and ascites tumour of white mice by pharmacology experiments, so it is worth researching deeply.

为此，本文运用化学拼合原理，提出了几种既含硒又含乙酰水杨酸的化合物新结构的合成路线，经过多次理论分析和探索试验，得到一种预测的新的化合物，命名为5-5′-二硒单乙酰水杨酸，经红外、紫外、飞行时间质谱测定，证明该化合物的结构为：经药理预试验表明，该化合物对小鼠S_(180)肉瘤和艾氏腹水型肿瘤均有抑制作用，具有深入研究的意义。

Replacing the total reflecting mirror in the plane-parallel resonator by a compound TIR prism (so-called a plane-compound TIR prism resonator or a TIR prism resonator for short), the offset of output faculae was resolved satisfactorily.

根据泵浦光在聚光腔中的传播规律，提出了一种适合于小型化器件的相交圆柱聚光腔的设计方法。本文通过大量的实验和理论研究，完成了工程化的小型Cr〓：YAG被动调Q重频热传导自然冷却：YAG激光器的结构和参数设计，并确定了器件的最佳工作点，最后完成了样品机的生产。

IR spectrum by force to discover around 393 Nm, the Si with the compound and filmy Ti3+/SiO2 that MTES decorates, the absorption of OH peak intensity is filmier than Ti3+/SiO2 reduce slightly, si, O, the absorption of Si the peak increases apparently, show structure of network of oxygen of compound and filmy silicon is more regular, the film of even and dispersive.

IR光谱发现，MTES修饰的Ti3+/SiO2复合薄膜的Si—OH的吸收峰强度比Ti3+/SiO2薄膜的略减小，Si—O—Si的吸收峰明显增强，表明复合薄膜硅氧网络结构更规则，有利于Ti3+的均匀分散。

Objective: To study the antibacterial effect in vitro of compound coptis chinensis solution on common pathogenic bacteria in oxygen humidified fluid, to provide scientific evidence for clinical application of compound coptis chinensis as oxygen humidified fluid.

研究复方黄连液对氧气湿化液中存在的常见致病菌的体外抗菌效果，从而为复方黄连液作为氧气湿化液的临床应用提供科学依据。

Now the company owns 5 production lines ( width 2 m, 2.5m and 3 m) and 6 different type carpet back rubberizing coating compound production lines imported from Europe ( such as single-side effervescence back rubberizing, full-immersion rubberizing, powder-spraying compound, PVC plastification heavy coating ).

公司拥有5条欧洲引进的针刺地毯生产线（幅宽2米、2.5米、3米）和6条不同类型的地毯背胶涂层复合生产线（有单面发泡背胶类、全浸渍上胶类、洒粉复合类、PVC塑化重涂层类）。

3 Clean and dry the threads of all the joints and accessories in the casing siring, apply compound on those joints from the second joint above the setting seat and thread-locking compound on all other joints.

4.2.3在碰压座以上一根套管及以下全部套管和附件的螺纹表面，应清洗干净并擦干，涂抹套管螺纹锁紧密封脂，其余套管在螺纹表面均勾涂抹套管螺纹密封脂。

The results show that nano-crystalline NiAl intermetallic compound can be synthesized by MA taking elemental powders of NixAl100-x(x＝25,30,40,50) as green reactants. Supersaturating solid solution NiAl intermetallic compound can be synthesized by MA using nonstoichiometric Ni-Al powders, and the synthesis mechanism is combustion reaction which includes forced solid solution based on atomic diffusion.

研究表明：NixAl100-x四种成分的元素粉末通过机械合金化方法均制备出纳米晶NiAl金属间化合物粉末；非化学计量配比成分的Ni-Al粉末通过机械合金化合成NiAl过饱和固溶合金，其机械合金化合成机理为含有以原子扩散为基础的强制固溶的燃烧合成反应。

ASP compound flooding is another tertiary oil recovery technology which is based on A/S, A/P and S/P compound floodings. Using the cooperation of displacement agents, it not only upraises the efficiency of displacement oil but also enlarges displacement volume, whereby the percent recovery of raw oil gears up considerably.

ASP三元复合驱是在二元复合驱的基础上发展起来的三次采油技术，它利用各驱油剂间的协同作用，不但提高洗油效率，而且扩大了驱替相的波及体积，从而大幅度提高原油的采收率。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。