New rice variety-ZUPEI 7 is the first variety bred by biotechnique which has the advantage of good quality, heigh yield, cold resistance and rice blast resistance.
水稻新品种组培7号是我国首次应用体细胞诱变技术选育而成的优质、高产、抗病、耐冷性强的北方粳稻新品种。
Survey the third order heigh level control network and conduct the statistics of the precision;
三等水准高程控制网的施测及精度统计;
Based on the error resource analysis in one-way photoelectric triangulated heigh survey, the horizontal distance equation is drawn for optimal station away from survey point.
分析了单向光电三角高程测量的误差来源,在此基础上推导了最佳测站位置离测点的平距公式。
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