在尿素中添加甲醛，能有效的增加成品尿素颗粒的强度，提高成品尿素粒度。
Through adds formaldehyde in the process of making urea grain, can efficiently increases the strength of urea and raises the particle size for urea.
试验表明，在卡拉胶包埋体系中，胶的产品来源、胶的浓度、 溶液中的离子、菌量和交联时间等，都会影响包埋颗粒的强度、 传质性能、稳定性及降解效率。
The reaction system for model dyes as indicators with entrapment particles was set up to study the effects of various conditions and factors on the results of entrapment.
产品性能改进还包括水中溶解性、颗粒强度等的提高。
The product property improvement also includes the increase of dissolvability in water, particle strength, etc.
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