Through copolycondensation methed a phenol-melamine - urea - formaldehyde resin was prepared .

通过共缩聚的方法，制备了具有良好的耐水性能和胶合性能的苯酚－三聚氰胺－ 尿素 －甲醛树脂。

Through a series of laboratory and small pilot scale continuous experiments the feasibility of urea - calcium superphosphate production with Yichang phosphorous ore has been proved .

通过一系列的实验室试验和小型中间连续试验，明确了宜昌磷矿制 尿素 过磷酸钙的可行性。

Researches on a New Technology for Urea - calcium - superphosphate Production

尿素 过磷酸钙的新工艺研究

Production of Ammonium Bicarbonate in Urea Process Determination of Degree of Polymerization for Urea - ammonium Polyphosphate

尿素聚磷酸 铵的聚合度测定方法研究

The discussion on K - T technology for production of urea - based compound fertilizer

尿 基复合肥K-T工艺技术分析

Study and Application of Emulsive Urea - formaldehyde Resin Sand Consolidating Agent

乳化 脲醛树脂固砂剂的研究及应用

Through artificial rainfall simulation experiment this paper mainly studied the effect of applying the different concentration polymers including Polypropylene - acid Polythene - hydri and Urea - formaldehyde resin .

通过人工模拟降雨试验，研究了坡面施加不同浓度的聚丙烯酸、聚乙烯醇、 脲醛树脂3种聚合物对防治土壤侵蚀的效果。

Study on Urea - formaldehyde Resin Modified by Plant Ash and Oxygenated Amylum

用草木灰和氧化淀粉改性 脲醛树脂胶粘剂的研究

Study on the method of making insect specimen by soaking in urea - formaldehyde resin

脲醛树脂包埋法制作昆虫标本技术研究

The properties of viscosity and surface activity of urea - formaldehyde oligomers were studied as well as their relationship with the encapsulation efficiency of microcapsules .

研究了低分子量 脲甲醛缩聚物水溶液的粘度特征和表面活性及其与胶囊包封率的关系。

The formulation and production process of this coatings were given and factors influencing the film properties such as level of urea - formaldehyde resin and acid curing catalyst were discussed .

介绍了该涂料的配方和配制工艺。讨论了 脲醛树脂用量和酸固化催化剂对涂膜性能的影响。

Application of Urea - based Grease on Sintering System

脲基润滑脂在烧结系统的应用

Chemical Structures and Acid-Catalyzed Curing Reactions or Urea - Furan Resin

呋喃 脲 醛树脂结构分析及其酸固化反应原理

Study on Modification of PVAc with Phenol - urea - formaldehyde Resin

苯酚- 尿素 -甲醛树脂对PVAc乳胶的改性研究

Direct Preparation Process of Microcapsules by in situ Polymerization of Urea - Formaldehyde

一步法制备 脲醛树脂微胶囊过程的研究

The thermodynamics on sulfuric acid in urea - water mixed solvent

尿素 -水混合溶剂中硫酸热力学性质的研究

Study of Viscosity of Urea - Sulfuric Acid Solution

尿素硫酸溶液粘度的研究

Comparison of the Influences of Ammonium Chloride and Ammonium Sulphate on the Properties of Urea - Formaldehyde Adhesives

硫酸铵与氯化铵对 脲醛树脂胶粘剂性能影响的比较

Productive Application of Urea - Base Compound & Mixing Fertilizer

尿 基复混肥的生产应用

Research on Urea - Phosphorus Compound Fertilizer

尿磷复合肥的研制

Study on the Curing Reaction of Urea - Furan Resin Catalyzed with Acids

酸促硬呋喃 脲醛树脂的硬化反应研究

Study on the Prepressing Problem of Plywood and Environmental Urea - Formaldehyde Resin Adhesive

胶合板预压问题及环保型 脲醛树脂胶粘剂的研究

Efficacy of urea - fluorosilicate and Triadimefon mixture on wheat powdery mildew control

氟硅 脲与粉锈宁混用防治小麦白粉病的研究

Study on polymerizing process of urea - formaldehyde

脲醛树脂胶聚合工艺的研究

Development and use of powder urea - formaldehyde adhesive

粉末 脲醛胶粘剂合成与应用进展

The Application of Tea Waste in Urea - formaldehyde Resin Adhesive

茶叶废料在 脲醛树脂中的应用研究

Urea - formaldehyde resins was used as the adhesive in present production there is formaldehyde to evaporate in the plank .

目前的生产中多以 脲醛树脂作为胶黏剂与棉秆碎料混合，进而模压板材。这类板材在使用过程中会挥发出有害的甲醛。

Plasma urea - N of group ⅲ were significantly lower than group ⅰ( P < 0.05 ) .

Ⅲ组血浆 尿素氮显著低于Ⅰ组（P<005）。

Studies on the digestion and utilization of urea - nitrogen ~ ( 15 ) n in goats

山羊对~（15） N- 尿素消化利用的研究

Effect of controlled - urea on urea - N transformation and yield

施用控释尿素后 土壤 尿素氮的转化及其对产量的影响