管口类

From the last century 80's hydraulic wrench in the system and the North China Huaneng Power Plant OFTA all started, after two decades of hard work, my company sold products to several dozens of categories, such as controllable torque tools , valve grinding machine, portable hole processing equipment, pipe beveling machine, high-energy welding equipment, processing equipment flange, heat exchanger tube repair, hydraulic tool equipment, such as ultra-high, with more than thirty foreign professional firms in China the exclusive authorized sales and after-sales service.

从上世纪80年代液压扳手在华能系统及华北电管局各电厂的应用开始，经过二十年的艰苦努力，我公司所销售产品发展到几大类数十种，如可控力矩工具、阀门研磨机、便携式孔加工设备、管道坡口机、高能焊接设备、法兰加工设备、换热器管修复、超高液压工具设备等，拥有三十余家国外专业公司在中国的独家销售及售后服务授权。

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。