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D. Applications, characteristics, sizing and selection of different types of cables/overload lines with due considerations to load factor, diversity factor, power factor, voltage drop and maximum demand of the installation.

各种电缆/架空电缆的应用、特性、尺寸定位和选择，必须适当考虑有关负载系数、不等率、功率因数、电压降及装置的最大需求量等因数。

Since the signal equipments imported is unable to meet the development demand of urban rail transit, independent research of the domestic digital jointless track circuit is critical. Charateristic analysis for signal transmission of digital jointless track circuit was mainly studied in this thesis. Design digital jointless track circuit analysis software, which validated the transmission parameters could or not meet requirements of the normal, shunt and signaling states, was the key work of the research.

本文在我国引进的国外信号设备无法满足国内城市轨道交通发展的需求，并自主研发出国产化试验型数字轨道电路的背景下，对数字无绝缘轨道电路信号传输进行特性分析，并设计出数字无绝缘轨道电路分析软件，实现对特定的轨道电路传输参数验证其能否满足调整、分流和机车信号工作状态的要求。

In 1999, the national production capability of maleic anhydride is 166000 ton and the actual production is more than 100000 ton, With the rapid development of national economy, the down-stream products of maleic anhydride are being used in more and more fields and the market demand of maleic anhydride is increasing day by day.

随着国民经济的快速发展，顺酐下游加工产品的应用领域不断扩大，市场对顺酐原料的需求量也昌逐增长。

At present, the demand of drain pipe exceeds its supply and is becoming a hot field of investment.

目前，排水管的需求超过供给，正成为一个热门的投资领域。

In order to solve some problems that the driving axle housings conformed to the demand of conventional design method,but it didn't accord with their professional standard in bench test.Based on the former study results,this paper has proposed a CAE design method for the driving axle housing.

为解决某些驱动桥壳虽然满足传统设计要求、但在台架试验中不符合行业标准的问题，在对驱动桥壳研究的基础上，提出了基于CAE的驱动桥壳设计方法。

Its basis basically is the immanent and external demand of the droit of factor of production and market economy.

其依据主要是生产要素的所有权和市场经济的内在客观要求。

Considering the particularity of the road network and the demand of the shortest path algorithm for the road network information, a new method of representation and storage of the road network to enhance the real-timeness of the shortest path algorithm was proposed based on the basic idea of the dual graph representation to improve the forward star structure.

考虑实际道路网络的特殊性以及最短路径算法对路网信息的要求，运用对偶图法的基本思想对前向关联边结构进行了改进，提出了一种能够提高路径优化算法实时性的路网表达方法与数据存储结构，并用Dijkstra和A*最短路径算法进行了验证。

The activity of the lipase increased after emergence and reached the peak after 10 d,which suggested that the demand of the beetles for fat was highest on the 10th day after eclosion.

进入体内的营养物质在血液、脂肪体等组织中在酶的作用下进一步代谢，这些酶活性的强弱与饲料的吸收利用有着直接的联系[2-3]。

Ecotype service stresses that the demand of human beings is satisfied by service and substituting products in order to reduce the consumption of raw materials and energy and to promote good circulation of ecology and scientific development of society and economy of human beings.

生态型服务强调通过服务来补充、替代产品对人们需要的满足，以减少原材料和能源的消耗，促进生态的良性循环和人类社会经济的科学发展。

We aim to fulfill the enlarging demand of life science researchers and supply edging products.

我们提供最好的产品以满足生命科学科研工作不断深入的需要。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。