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Life It is said that the durability of the valve is a valve key performance indicators, and has great economic significance.

& Little knowledge - valve performance &是由中国疏水阀网提供的国际阀门新闻，译文仅供参考。

Sealing Valve valve sealing performance Filter is part of the sealing ability to prevent media leaks, it is the valve of the most important technical performance indicators.

密封性能阀门的密封性能是指阀门各密封部位阻止介质泄漏的能力，它是阀门最重要的技术性能指标。

The mainly study results as follows:(1) The study focused on the characteristics of whole distribution and typical structures of water conservation forest in moutain areas of Beijing. According to analized the structure of 18 typical forest stands, including the species structure, horizontal structure, vertical structure, quantitative indicators and standards.Conclusion that: uneven-aged, double layer and mixed structure were .

通过对北京山区水源林18种典型森林类型林分结构归纳总结，从林分物种结构、水平结构(混交度、年龄、郁闭度、大小比数)、垂直结构、生物量、土壤厚度等方面，提出北京山区典型森林类型的结构特征，并定量化表达，从而总结出北京山区水源林结构的关键要素是：异龄、复层和混交。

In order to establish an analysis framework for its centrality and performance, this paper focus on the type, measure indicators and economic effects of vc networks.

本文着重研究了创业投资网络的类型、测度指标及其经济效应，试图建立一个有关创业投资网络中心性及其绩效关系的分析框架。

The use of rock geomechanics classification method to increase the tiger to the right tunnel surrounding rock classification, the reference and evaluation criteria while rock classification method and the BQ were varied, but the same number of factors can be integrated indicators of scientific objective of rock classification for the tunnel to provide an important basis for the design and construction.

利用岩体地质力学分类方法对老虎岭隧道右幅进行围岩分类，其参考因素和评价标准虽然与BQ围岩分级方法不尽相同，但同样能够综合多因素综合指标，对围岩进行科学客观的分类，为隧道的设计施工提供重要依据。

Ordinary commodity housing construction project in a specific item, a notice of land use rights transfer must be planning indicators, such as consumer demand Taoxing area as land tenure tender, auction or listing transferring lead conditions; in a contract or transfer of land use rights transfer land to the book, it must contain the above elements, to ensure that low-cost housing spaces ordinary commodity effective supply.

对普通商品住房建设项目，在发布具体项目的土地使用权出让公告中，必须把各项规划指标、套型面积等控制性要求作为土地使用权招标、拍卖或挂牌出让的前置条件；在土地使用权出让合同或划拨土地决定书中，也必须载明上述内容，以保证中低价位普通商品住房的有效供应。

It focused on the cycle of blast furnace production of two town gas from coal gasification process and the basic requirements for the production cycle time of their choice and some indicators of a comparative analysis of gasification.

文中着重介绍了循环鼓风两段炉生产城市煤气的工艺流程和对气化用煤的基本要求，对其生产循环时间的选择和部分气化指标作了比较分析。

However,there have been no papers which have investigated Minkowski and Minkowski slant helices and Minkowski conical geodesic curves so far as.In this paper,our major study is to give the definition of Minkowski general helix and Minkowski slant helices and Minkowski conical geodesic curves in indicators 1 in pseudo-Euclidean three-space (that is, three-dimensional Minkowski space), and study the definition of equivalence Minkowski general helix, By considering geometric invariants of these space curves, we can estimate the order of contact with those special curves for general space curves.

本篇文章主要研究在指标数为1的3维伪欧氏空间(即三维Minkowski空间)中，我们给出Minkowski一般螺线、Minkowski斜螺线和Minkowski锥面测地线的定义，研究Minkowski一般螺线的等价定义，给出Minkowski斜螺线和Minkowski锥面测地线作为三维Minkowski空间中的特殊曲线所特有的性质，并通过考虑三维Minkowski空间曲线的几何不变量，估计Minkowski斜螺线和Minkowski锥面测地线这两种特殊曲线和一般Minkowski空间曲线切触的阶数。

Tactile,pain perception and temperature sensation are relatively early indicators.

触觉、疼痛觉和温度觉是相对较早的指标。

Enterprise reform and development to the main line, continually tap the internal potential to reactivate the stock assets, and properly settle the workers, major economic indicators rising steadily increasing the income of workers.

企业以改革发展为主线，不断挖掘内部潜力，盘活存量资产，妥善安置职工，主要经济指标不断提高，职工收入稳步增加。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。