Besides using nitrogen spring is discussed. I give another resolving method in improving the plane tolerance of compound die part.
并且对氮气弹簧的应用进行了论述，对满足多工位级进模中零件的平面度要求提出了另一种解决方法。
The application of nitrogen spring on cool punching die is introduced, and the elastic components such as 'heavy-load used polyurethane' components is briefly stated.
前言：介绍氮气弹簧在冷冲模中的应用，另外还简单介绍了“高负载用聚氨酯”组件等弹性元件。
This spring, a federal science advisory report is expected to recommend a national goal of improving the efficiency of farm nitrogen fertilizer use by 25 percent, Herz and Galloway say.
今年春天，一份联邦科学建议报告有可能建议提高氮肥使用率提高25%的国家目标。赫兹和盖洛韦说。
In summary, under zero till crop response to nitrogen levels in the spring was approximately twice as large compared to conventional till.
总之，在免耕地条件下，春季作物对土壤含氮量的反应大约是常规耕作的2倍。
Nitrogen nutrition level has some influence on the growth and development of spring maize leaves.
氮素营养水平对春玉米的叶片生长有一定的影响。
The paper probed into the relations between nutritional elements (Nitrogen, Phosphorus) and protective enzyme system of spring wheat seedling (SWS) under different water level in potted condition.
通过盆载试验，研究了氮、磷营养在水分亏缺情况下对春小麦幼苗相关保护酶活性的影响。
Introduced the structure and characteristics of nitrogen gas spring, listing several kinds of application in auto die, and finally points out its way in application note.
介绍了氮气弹簧的结构及其特点，列举了其在汽车模具中的几种应用方式，最后指出其在应用中的注意事项。
Renovation also includes adding fertilizer. Adding nitrogen as a side or top dressing in late summer will supply nutrients to the fruit buds for the following spring.
“更新”还包括就添加肥料。添加氮素是一方面，或者在夏末进行追肥，这样将能在来年的春季为果芽提供养分。
Results showed that nitrogen quantity was the chief factor to affect spring maize yield, irrigation quantity was the second factor, phosphorus quantity was the third.
结果表明，在试验年施氮量对产量影响最大，灌溉量次之，施磷量最小。
The effect of nitrogen dosage on starch content and key enzyme activity in composing starch in kernels of spring maize was studied.
以不同品种春玉米为试验材料，研究氮肥施用量对春玉米子粒淀粉含量及淀粉合成关键酶活性的影响。
The study on absorption and utilization of organic nitrogen on spring wheat has been done by 15N trace method The.
应用15N示踪法探讨了春小麦对有机氮的吸收利用问题。
The study on absorption and utilization of organic nitrogen on spring wheat has been done by 15N trace method The.
应用15N示踪法探讨了春小麦对有机氮的吸收利用问题。
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