Based on reaction mechanism of UF, low toxic and modified technology of UF were discussed.
从脲醛树脂生成机理出发，介绍了脲醛树脂的低毒改性技术。
Results Diabetic Kidney disease, the elderly, UF quantity big, the secondary of secondary hyperparathyroidism in patients with marked increase in ratio of low blood pressure.
结果糖尿病肾病、高龄、超滤量大、继发性甲旁亢的患者发生低血压的比例明显增加。
Modifier was added on medium-term of synthetic process with its adding amount being 3%, a favourable low toxic modified UF resin adhesive could be synthesized on the basis of colloid theory.
应用胶体理论，在树脂合成过程中期加入改性剂，改性剂添加量为3%，合成了性能良好的低毒改性脲醛树脂胶。
Influence of methanol content in formaldehyde used as raw material for preparing low-formaldehyde (low molecular ratio) UF resin was studied.
研究了原料甲醛中甲醇含量对低醛化(低摩尔比)脲醛树脂性能的影响。
Thus, low voltage protection devices, served as lock-out protection reserve will also have characters uf inverse time-lag.
因此，作为失步保护后备的低电压保护也应具有反时限特性。
Thus, low voltage protection devices, served as lock-out protection reserve will also have characters uf inverse time-lag.
因此，作为失步保护后备的低电压保护也应具有反时限特性。
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