allay相关论文
【目的】研究冬油菜在高寒地区最佳适宜播种期,实现阿勒泰地区农作物多熟制。【方法】采用随机区组试验,研究不同播种期对冬油菜越冬......
Partially amorphous Ni-Nb alloy was made by 1.91 kW cw CO<sub>2</sub> laser melt-quenching,and fully amorphous by 4.5 kW......