查询词典 h.a.

A synthesis method of 2-(2'-hydroxyl-4'-benzoyloxy-phenyl)-2H-benzotriazole and derivatives thereof is provided, and is characterized in that 2-(2', 4'-dihydroxyphenyl)-5-X-2H-benzotriazole and benzoyl chloride are taken as raw materials for reaction in solvent for 1-8 hours under the temperature of 50-140 DEC C with the mole ratio of 1 to 0.95-1.1, wherein, the amount of the solvent is 2 to 20 times that of the 2-(2', 4'-dihydroxyphenyl)-5-X-2H-benzotriazole and X represents H, F, Cl, Br.

一种2-(2′-羟基-4′-苯甲酸基苯基)-2H-苯并三唑及其衍生物的合成方法，其特征是，以2-(2′，4′-二羟基苯基)-5-X-2H-苯并三唑和苯甲酰氯为原料，在溶剂中进行反应，反应温度50℃～140℃，反应时间1～8小时，反应原料摩尔比2-(2′，4′-二羟基苯基)-5-X-2H-苯并三唑∶苯甲酰氯为1∶0.95～1.1，溶剂用量为2-(2′，4′-二羟基苯基)-5-X-2H-苯并三唑重量的2～20倍，其中X代表H、F、Cl、Br，具有反应条件温和、反应收率高和产物纯度高的特点。

CRT as a booster pump and transfer pump sea water treatment and other abrasive liquids, reliable performance, and in the industry with the most extensive product line, flow up to 2200 l / h, pressure head of up to 250 meters ( specially designed high-pressure pump up to 450 meters).

CRT泵在作为增压泵和传送泵处理海水和其它磨蚀性液体时，性能可靠，而且在该行业中具有最广的产品系列，流量最高可达2200 l/h，压头最高为250米（特制的高压泵可达450米）。

In order to enhance its core competitiveness in the dredging market, GDC invests a large amount of money on equipment upgrading. The 9000 m3 TSHD, 3000 m3/h CSD/Bucket Wheel Dredger, 30 m3 Grab Dredger as well as other dredgers under construction could increase the annual dredging capacity of the company tremendously.

为适应未来疏浚市场的发展需求，公司近年已建成或在建新一批大型、先进设备，如9000m3舱容以上的自航耙吸式挖泥船和3000 m3/h以上的绞吸/斗轮式挖泥船，以及30m3以上的抓斗船，届时公司的年疏浚能力将进一步大幅提高。

Union Rui Enterprise Co., Ltd. is committed to high-speed stamping equipment and automation equipment surrounding the design and manufacture more than 15 years, with a high degree of technology for stamping equipment factory specializing in the production of high-speed precision automatic punching machine, punching machine brand: Taiwan Joint sharp punch, Taiwan Alliance sharp high-speed punch, Taiwan Union Rui CNC punch press, the sharp precision punching machine, the sharp C-sharp high-speed punch and joint high-speed H-type gantry punch, peripherals and other products, to undertake various types and specifications for the production of non-standard products.

联锐企业有限公司致力于高速冲压设备及周边自动化设备设计制造已逾15载，为拥有高度技术的冲压设备制造厂，以专业生产高速精密自动冲床，冲床品牌为：台湾联锐冲床、台湾联锐高速冲床、台湾联锐数控冲床、联锐精密冲床、联锐C型高速冲床及联锐H型龙门高速冲床，周边设备等产品，承接各种类型和规格的非标准产品制作。

In 1879, the United Kingdom H. J. Lawson developed a 30-pound, 2 of the chain-driven bike.

1879年，英国的H.J。劳森研制出了30磅重、二轮的链条驱动自行车。

Is a company specializing in the production and installation of steel H-series products, EPS sandwich panel material, the combination of slab, pressure plate and supporting the modernization of the company products.

哈尔滨东安建筑钢结构有限公司是一家专业生产及安装H型钢等系列钢结构产品，EPS夹芯板材，组合楼板，压型板及其配套产品的现代化公司。

The results indicated that the lamllar liquid crystal of OLA/TEA/LP/H〓O system could be a good lubricant on aluminum alloy.

实验结果表明，OLA/TEA/LP/H〓O体系层状液晶具有较好的极压性能，对于铝合金材料是一种较好的润滑剂。

METHODS: Stably transfected cells were cultured per well in a 6well tissue culture plate and cultured for 24 h.

将稳定转染的HeLaNS5A和HeLaNS5AΔISDR细胞在6孔培养板中培养24 h后，加入人基因工程α2a型干扰素(rHuIFNα2a)至所需浓度。

Products in other areas also include UHT Taiwan pneumatic electric polishing machine, Japan will sharply XBC oilstone alumina fiber grams, Japan Nippon Steel Carbon Fiber Super oilstone, Japan shield super sharp fiber oilstone, China grinding wheel, grinding wheel Norton, Taiwan (1 products) diamond paste, diamond grinding rods, diamond grinding wheel repair knife, diamond file, diamond grinding wheel, polishing head, wire-cutting brass with electrodes, copper, import machine accessories, precision measuring tools Sanfeng Japan, West Germany H + S gasket, such as a series of comprehensive range of mold-specific supplies.

在其他方面的产品还包括台湾UHT气动电动抛光机，日本XBC锐必克氧化铝纤维油石、日本新日铁碳纤维超级油石、日本犀利盾超级纤维油石，中国砂轮、诺顿砂轮，台湾钻石膏、钻石磨棒、钻石砂轮修刀、钻石锉刀、钻石砂轮、抛光头、线切割用电极铜管、铜线、进口机床配件、日本三丰精密测量工具、西德H+S垫片等一系列品种齐全的模具专用耗材。

A New type of benzoxzine precursors was systhesized based on methoxy methylene diphenyl ether oligomer.The struture of product was characterized by IR and H-NMR analysis and effects of solvent polarity,temperature on the precursor composition were investigated.

以甲氧基次甲基二苯醚低聚物为基础合成了苯并口恶嗪预聚物，用H－NMR、IR表征了该预聚物的结构，讨论了反应温度、溶剂的极性等因素对合成预聚物的结构和组成的影响。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。