查询词典 nitrogen-free

The strengthening effect of vanadium to low-alloy steel is introduced,its microalloying role researched and discussed,different effects to strengthen steel with vanadium-nitrogen alloy or ferrovanadium as additive concluded.

分析了钒对低合金钢的强化作用，对VN的微合金化作用进行了研究和探讨，提出用钒氮合金和钒铁做添加剂对钢强化具有不同效果。

The strengthen ing effect of vanadium to low-alloy steel is introduced,its microalloying role researched and discussed,different effects to strengthen steel with vanadium-nitrogen alloy or ferrovanadium as additive concluded.

分析了钒对低合金钢的强化作用，对VN的微合金化作用进行了研究和探讨，提出用钒氮合金和钒铁做添加剂对钢强化具有不同效果。

The small size particles produced during ferrovanadium sizing operation are formed into nitrided briquette so as to obtain nitrided ferrovanadium, The effect of ferroalloy size, pressure, nitriding temperature and nitniding time was studied on the nitrogen content of the product.

对高钒铁合金精整过程中产生的细颗粒物料进行压块渗氮，得到氮化钒铁产品，研究了合金粒度、压块压强、渗氮温度、渗氮时间对产品含氮量的影响。

By contrast, fertiliser subsidies encourage futile over-use of nitrogen in parts of China.

但与此形成对比的是，中国的部分地区却在通过化肥补贴来鼓励氮肥的无效的过度使用。

Some of these changes are caused by CO2 emissions resulting from the use of fossil fuels, or by the application of nitrogen compounds from fertiliser to soils.

其中的一些变化的原因主要是由化石燃料的，或从化肥氮的化合物申请使用造成的土壤二氧化碳排放量。

A way to encourage larger yields and fertilize the soil is to help the production of nitrogen.

一种增加产量肥沃土壤的方法，就是帮助氮肥的产生。

The level and form of nitrogen fertilizer could significantly influence the growth and development of plant.

氮肥的施用量和形态对植物的影响很大。

Objective To study dynamic change of carbon and nitrogen rate during the growing period of Ferula fukangensis.

目的研究阜康阿魏碳、氮代谢在不同生长时期的动态及挥发油和阿魏酸含量变化规律，为人工栽培提供理论依据。

Different nitrogen forms; Tall fescue; physiological and ecological index; regulations of heat tolerance

不同氮源；高羊茅；抗性生理生态指标；耐热性调控；抗热调控

The furnace protection process is optimized from the following ways: determining the best fettling time and location for various fettling materials,adjusting reasonably the component of end slag,improving slag splashing effect,regulating nitrogen pressure,meeting demands for slag splashing,and so the cost of furnace protection is reduced.

认真分析和实验，从三个方面对护炉工艺进行了优化：确认各种不同补炉料的最佳补炉时间和位置，合理调整终渣成分、改善溅渣效果，调整氮气压力，满足溅渣需求，对护炉工艺进行了优化，从而降低了护炉成本，取得了明显的经济效益。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。