文章以郑西铁路客运专线函谷关隧道横洞挑顶为例，介绍了一种新型挑顶施工工艺——垂直挑顶法。
Taking the cross cave propping in Hanguguan Tunnel of passengers special line on Zhengxi railway, this paper introduces a new construction technique of propping - vertical propping method.
GS豫豆8号是用系谱法从郑74046品系与尖叶桥梁亲本自然杂交株的杂种后代中选育成的窄叶型大豆新品种。
GS Yudou 8 is a narrow-leafed soybean variety derived from the natural hybrid of Zheng 74046 line and a tip soybean parent material (paternal) with a pedigree selection method.
GS豫豆8号是用系谱法从郑74046品系与尖叶桥梁亲本自然杂交株的杂种后代中选育成的窄叶型大豆新品种。
GS Yudou 8 is a narrow-leafed soybean variety derived from the natural hybrid of Zheng 74046 line and a tip soybean parent material (paternal) with a pedigree selection method.
应用推荐