查询词典 toll telephone system

This paper states the first opened digital railway division communication system which is constructed with ΔM multiplex transmission system and digital division telephone switching system on the toll symetrical cable at Zhengzhou-Luoyang Railway Division.

本文介绍了在郑州—洛阳区段的长途对称电缆上开通的我国铁路第一个数字式区段通信系统，它由△M多路复用传输系统和数字式区段电话交换系统构成。

The development ratio of toll telephone service and telegraphy service is studied by using gray system theory.

利用灰色系统理论研究了长话与电报业务发展比的情况，在理论上证明了态势研究中不同量纲与相同量纲具有相同参数的结论。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。