试验研究了在冀西北高寒区冷凉气候条件下脱毒微型薯的高效生产技术。
In this paper the high efficient technology of virus free minituber production of potato under cold condition in the cold area of northwestern Hebei was studied.
河北省矿泉共有百余处，主要分布于冀北、冀西山地区及冀西北间山盆地区。
There are about one hundred mineral springs in Hebai province which mainly distribute in the northern and western mountain areas or in the west-northern basins.
位于冀西北张家口-宣化地区的转枝莲辉石闪长岩侵入水泉沟正长岩杂岩体中。
The Zhuanzhilian pyroxene diorite is found in Zhangjiakou-Xuanhua area, northwest of Hebei Province.
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