1)  north area
北山区
1.
Considering the difficulty of deep Ventilation,the main problems exist in the primary ventilation system of Yinshan orefield in north area are analysed .
针对银山铅锌矿北山区深部通风困难的状况 ,分析了北山区原通风系统存在的主要问题 ,为了适应生产发展的需要 ,结合矿体赋存条件和生产布局对原通风系统进行了改造 ,新系统投入运行后 ,深部通风条件有较大改善 ,达到了预期目的。
2)  Northeast mountains
东北山区
3)  mountainous area of North China
华北山区
1.
The mountainous area of North China is surrounded by the North China Plain, Shanxi Gansu Loess Plateau and Inner Mongolia Plateau.
北山区位于华北平原与陕甘黄土高原以及内蒙古高原之间,是我国经济欠发达地区之一。
2.
Rainfall simulation on representative plots(5 m wide and 10 m long) in a mountainous area of North China was carried out to compare water discharge and recession characteristics by surface runoff,soil-layer flow and mantle rock flow.
通过位于北京市怀柔区东台沟的华北山区典型坡面径流场内人工模拟降雨实验,分别讨论了地表径流、壤中流和基岩风化带出流共3层的退水特征,三者比较结果表明,壤中流最早开始退水,其退水历时最长,流量最小;地表径流的退水一般受降雨和地形地貌的影响,雨停后迅速消退;基岩风化带出流通常在地表径流退水的后半段开始。
4)  Mountainous region of north Guizhou
黔北山区
5)  northern mountain area of Beijing
京北山区
1.
Studies on the nutrient content property of Robinia pseudoacacia water resource protection forest ecosystem in northern mountain area of Beijing;
北山区人工刺槐水源涵养林主要养分元素含量特征分析
6)  mountainous regions of Hebei Province
河北山区
1.
Forestry eco-environmental quality evaluation in mountainous regions of Hebei Province.;
北山区森林生态环境质量评价
参考词条
补充资料:北还登汉阳北原题临川驿
【诗文】:
驱车方向阙,回首一临川。多垒非余耻,无谋终自怜。
乱松知野寺,馀雪记山田。惆怅樵渔事,今还又落然。



【注释】:



【出处】:
全唐诗:卷351-24
说明:补充资料仅用于学习参考,请勿用于其它任何用途。