In 1857 America entered the toothbrush market when H. N. Wadsworth was awarded the first patent in America for their production.
1857年牙刷进入美国市场，H.N.沃兹沃斯第一个获得特许在美国生产牙刷。
All development wells of liwa n will be permanently installed with surface direct-reading subsurface pressure gauge and thermometer to support gas reservoir management and production optimization.
荔湾所有的开发井都将安装永久式的地面直读井下压力和温度计，为气藏管理和生产优化提供支持。
The technology of N-95cleaning fluid with DJ specific additive special for bearing liner production line is introduced.
介绍了以DJ为特效添加剂的N- 95型专用于轴瓦生产流水线的清洗液的工艺特点。
The field experiment was conducted to study the effect of organic N and mineral N combined application proportion in greenhouse celery production.
研究了田间试验条件下有机N与无机N不同配比对温室芹菜生产的影响。
The production, demonstrated that N-application on the leaf surface could relax the supplying-demanding relation in soybean flowering period.
生产验证叶面给氮可以缓解大豆花荚期氮素供需之间的矛盾。
In this paper, a new chloroform production process by reaction of chlorinated oil with dimethyl amine instead of lime is introduced, in which N, N- dimethyl methanamide is coproduct.
介绍了一种采用二甲胺代替石灰与氯油反应，在生产氯仿的同时联产N，N-二甲基甲酰胺的新工艺。
Human activities such as fossil fuel combustion, nitrogen fertilizer production and cultivation of nitrogen fixing crops are the main sources of reactive n.
人类活动，如燃料燃烧、氮肥生产、固氮植物的培育和畜牧业的集约经营等是引起全球活性氮增加的主要原因。
The selective exchange process was used in the treatment of wastewater containing NH 3 N from catalyst production.
用铵离子选择交换工艺对催化剂生产过程排出的含氨氮废水进行处理。
The production capacity and structure features of 6M25 N 2 H 2 compressor, and its choice in design were introduced.
介绍了设计中所选用的6M2 5氮氢气压缩机的生产能力、设备结构特点。
The paper was introduction the N-Tallow-1,3-diaminopropane of secondary amines and production process and application.
本文介绍了N- 烷基-1，3-丙撑二胺的反应原理、生产工艺及其应用。
The direct blending of urea and coated PK granules prohibits the problems in the production of compound fertilizer based on urea-SSP, with lower N loss, easier sale and more economy.
采用尿素与包裹后的磷钾粒肥直接掺混，避免和解决了尿素-过磷酸钙系复混肥生产中存在的一系列问题，减少了氮素的损失，提高了产品的市场销售属性，增大了企业经济效益。
The syntheses of 3,5-dinitro-4-di-n-propylamidobenzenesulfong chloride and oryzalin was improved, makes more is fit for the requirement in the industrial production.
改进了中间体3，5-二硝基-4-二正丙胺基苯磺酰氯和最终产品安磺灵的合成方法，使之更适合于工业生产的要求。
Moreover, the relative production rates of leading hadrons are obtained, which shows a strong correlation with the quark pair number n.
进一步给出领头强子的相对产率，同样明显与初始夸克味道和夸克对数n有关。
Discusses the mechanism and harmfulness of undesired formation of butyl ether by inter-molecular dehydration of n-butanol during DBP production. Preventive measures are also provided.
着重讨论了DBP(邻苯二甲酸二丁酯)生产过程中，丁醇分子间脱水生成丁醚的副反应机理及危害，并找出了预防副反应发生的措施。
A rapid analysis method for all forms of chloramines in water production process was developed by using n, N-Diethyl-p-phenylenediamine (DPD) spectrophotometry.
运用DPD (N, N -二乙基对苯二胺)分光光度法，建立了快速分析制水工艺过程中各种氯胺含量的方法。
The effect of five N levels on root yield and sugar content and production of sugar was studied with one beet variety, in order to select the best N level for high yield and high sugar content.
本试验主要是研究同一甜菜品种在五种氮素水平处理下对甜菜的块根产量、含糖率、产糖量的影响，寻求获得高产高糖的最佳施用氮素水平。
Aminopeptidase, a collection of enzymes which can remove amino acid from the N-terminus of peptides one by one, is very important in protein hydrolysate production and debittering.
氨肽酶是一类从多肽链的氮末端顺序逐个水解氨基酸的酶，在蛋白水解液脱苦和蛋白质的深度水解中有重要作用。
The mathematics equations of dynamic fertilization mode were set up to determine the rational N dosage and proportion of additional fertilizer for different production goals.
得出了不同目标产量时的最佳氮肥用量与追施比例和对应于氮肥不同用量的最佳追施比例及理论产量的动态施肥模式的数学方程。
N-acetyl amines, as an important kind of organic intermediate, are applied widely in the production of medicines, pesticides, fine-chemicals and military affaires.
乙酰芳胺是一类非常重要的有机中间体，在医药、农药、精细化工、军事等领域应用广泛。
P fertilization increased N, P and K accumulation in tree biomass and nutrient use efficiency in wood and biomass production.
施P肥还增加了树木N、P和K的养分积累量，提高了上述养分的利用效率。
There was a significant increment(P<0.05)in BCP production and significant decreases(P<0.05) in NH3-N concentration and NDF content in the culture residue when the FOS addition level was over 0.60%.
当添加量在0.60%以上时，可以显著（P<0.05）提高培养液中的BCP含量，显著（P<0.05）降低培养液中的NH3-N含量和培养残渣中的NDF含量；
The H-N ratio in the production of synthetic ammonia is one of the most important parameters to increase the product yield which is an efficiency measure to keep the optimal production.
氢氮比是合成氨装置最为关键的参数之一，保持比值始终处于最佳状态是提高合成氨产量的有效措施。
N recent years, we have to provide users with a more than 30 of welding wire production line.
几年来，我们向用户提供了三十多条焊丝生产线。
The study of nitrogen balance in stock farming system is the basis of nutrient management in animal husbandry production, and the determination of N cycling parameters is the foundation of this study.
畜牧系统中N流动与平衡的研究是畜牧业进行养分资源管理的基础，而参数的确定又是研究养分循环与平衡的基础工作。
Objective To investigate the influences of oxygen vector n-hexadecane on Xanthophyllomyces dendrorhous growth and astaxanthin production in the shake-flask culture.
目的考察氧载体正十六烷对红法夫酵母发酵产虾青素的影响。
Objective To investigate the influences of oxygen vector n-hexadecane on Xanthophyllomyces dendrorhous growth and astaxanthin production in the shake-flask culture.
目的考察氧载体正十六烷对红法夫酵母发酵产虾青素的影响。
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