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SAF-HOLLAND customers include the majority of large truck and trailer producers all over the world. The products are sold to Original Equipment Manufacturers and Original Equipment Suppliers by means of a global service and distribution network and via aftermarket channels directly to the end users and service workshops.

产品通过全球服务和分销网络销往原始设备制造商和原始设备供应商，并通过售后市场的渠道直接销往最终用户以及维修工厂。

Secondly, this article introduces the basic theoretical knowledge of marketing channel and transceiver sales channels establishment and way of control.

其次，文章介绍了营销渠道的基础理论知识和专业对讲机销售渠道的建立和管理控制。

This assay is focuses on part of access network technology. The main contents are as the follows.To discuss the function of the forthcoming copper loop, city cable channels once and twice parameters are analyzed and calculated, and simple analytic model are used to describe the characteristics of channel. The transformation of parameter related to applied HDSL technology in higher band of frequency, and the influences of near reaction and twisted subscriber line are mainly analyzed.

本文针对接入网技术的部分技术进行了分析和讨论，主要内容有以下几部分：为探讨现有的铜线回路的性能，对市话电缆信道的一次参数和二次参数进行了分析计算，并引入简单的解析模型来描述信道特性，其中着重分析了与应用HDSL技术有关的较高频段内参数的变化，邻近效应和用户线扭绞等因素的影响。

The translational energy distributions of the two product channels could be obtained.

进一步可获得两反应通道的产物平移动能分布。

We have measured the translational energy and the angular distributions of the fragments. The C-Br bond fission dynamics in the ultraviolet photodissociation has been analyzed. The effect of coupling between the potential energy surfaces on the product channels has been discussed.

第二部分是利用离子速度影像技术对1，2-C2H4Br2、tert-C4H9Br和iso-C4H9Br的紫外光解动力学的研究，获得了光解产物的平动能分布和角度分布信息，分析了这些分子的断键机理，研究了势能面间的相互耦合对光解产物状态的影响。

M. translational distribution, angular distribution, and the branching ratios for different possible product channels by measuring the angle-resolved time of flight spectra of photofragments. Information about photodissociation processes such as dissociative lifetime of parent molecule, the orientation of transition dipole moment, and the symmetry change of the highly excited states can be deduced from the translational energy distribution and angular distribution.

碎片平动能谱方法是在无碰撞条件下研究光解动力学的一种理想方法，它通过测量光致碎片在不同角度的时间飞渡谱(Time of Flight，简称TOF)，可以得到光解碎片质心系的平动能分布、角分布和不同解离通道之间的分支比等，由此可以推知母分子的解离寿命、跃迁偶极距的取向以及激发态分子的对称性变化等过渡态的动力学信息。

Photofragment translational spectroscopy is an ideal tool to investigate photodissociation dynamics under collision-free conditions through which one can obtain the total center of mass translational distribution, angular distribution, and the branching ratios for different possible product channels by measuring the angle-resolved time of flight spectra of photofragments. Information about photodissociation processes such as dissociative lifetime of parent molecule, the orientation of transition dipole moment, and the symmetry change of the highly excited states can be deduced from the translational energy distribution and angular distribution.

碎片平动能谱方法是在无碰撞条件下研究光解动力学的一种理想方法，它通过测量光致碎片在不同角度的时间飞渡谱(Time of Flight，简称TOF)，可以得到光解碎片质心系的平动能分布、角分布和不同解离通道之间的分支比等，由此可以推知母分子的解离寿命、跃迁偶极距的取向以及激发态分子的对称性变化等过渡态的动力学信息。

Numerical results show that such a structure can produce multiple transmission channels, and each channel can be tuned independently.

数值计算结果表明，该结构的带隙中可产生多个透射通道，任意一个通道的频率可被独立调节而其他通道的频率均保持不变。

In frequency selective fading channels, different channel has different fading, that is to say, different channel has different transmission quality.

在频率选择性衰落信道中，不同的子信道受到不同的衰落，也就是说有不同的传输质量。

We can do any channels in our tv transmitter.

我们可以在我们的电视发射机渠道。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。