nitrogen requirement for growth 生长需要
nitrogen requirement for maintain 维持氮
minimum protein nitrogen requirement 蛋白质最小需要量
nitrogen requirement per kg grain 每百公斤稻谷吸氮量
Total nitrogen requirement of crops 作物需氮总量
nitrogen requirement per 100kg grain 每百公斤稻谷吸氮量
Nitrogen Maintenance Requirement 氮维持需要量
The results show that when the nitrogen content is decreased, the yield strength of hot rolled plate decreases, which meets the requirement of cold-rolled base stuff.
指出了钢中氮质量分数的减少可降低热轧板屈服强度，且满足供冷轧基料的要求。
The etherification process of FCC light gasoline meets the requirement of producing clean gasoline, while the basic nitrogen compounds can deactivate the etherification catalyst-sulfonic acid resin.
催化裂化轻汽油醚化工艺适应了生产清洁汽油的要求，轻汽油中含有的少量碱性氮化物中和阳离子交换树脂催化剂的酸性，造成催化剂失活。
The process of naked cooling with nitrogen cycle refrigeration was proposed according to the producing requirement, followed by some points to note during the naked cooling process.
根据生产需要，提供了利用氮气循环制冷实现空分设备裸冷的工艺方法，分析了实施过程中的注意问题；
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