查询词典 low-cost

Because the carbonyl in its structure is with strongly absorb-electron effect, so it is a kind of non-proton polarity solvent with high boiling point, high flash point and low melting point, use conveniently for many processing operation such as filtration, distillation, solvent extraction, and so on; it is with very low toxicity, so the harm to human body is inappreciable, and reduce the environment pollution; due to its very strong dissolvability, it can dissolve organic matter, inorganic matter, resin, polymer, etc., and activate all kinds of reagent, mix to dissolve the other high boiling point solvents; it is with very good stability, it is stable under the hot strong alkali and acidity condition, it is with water-resistance and light, oxygen stability.

246℃ m.p：—20℃闪点121℃ flash point： 121℃分子式：C6H12N2O molecular formula： C6H12N2O 分子量128.18 molecular weight： 128.18 二、DMPU的化学性质 Chemical character of DMPU 其结构中由于羰基具有强烈的吸电子效应，因而它是一种非质子的极性溶剂，具有高沸点、高闪点、低熔点，在过滤、蒸馏、溶剂萃取等工艺操作中使用方便；毒性极低，对人体危害微不足道，也减少了对环境的污染；由于它具有极强的溶解性，能溶解有机物、无机物、树脂、聚合物等，并对各种试剂具有活化性质，还能与其它高沸点溶剂混溶；具有极好的稳定性，在热的强碱和酸性条件下都很稳定，还具有耐水性及对光、氧的稳定性。

And the company is the first one entitled to draft out the standard of low pressure casting line, which is a professional manufacturer of special casting equipment including low-pressure die casting machine, differential pressure die casting machine, extrusion die casting machine, inclinable gravity casting machine, air tight tester, air-elimination refine machines, hydrogen-test machines etc.

主要从事低压铸造机、差压铸造机、挤压铸造机、可倾式重力铸造机、气密性试验机、除气精炼机、测氢仪等热加工专用及辅助设备的生产。

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。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。