n p and k application 氮磷钾施用
In the paper, the high frequency pulse tube coolers (PTCs) developed for 80 K and below temperature application are introduced.
首先介绍了作者开发的可用于80 K及以下温区的高频脉冲管制冷机。
In this dissertation, we will investigate the application of several high-k dielectric and metal gate process technologies.
在本论文中，吾人将探讨数种高介电系数介电层与金属闸极的研究与应用。
Effect of application of K fertilizer and wheat straw to soil on crop yield and status of soil K in plough layer under different planting systems was studied.
研究施钾和秸秆还田对华北地区不同种植制度下作物产量和耕层土壤钾素状况的影响。
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