Forepassed the track , with holding the high quality policy , applying strict quality contrort , managering by professional , xinxiang forestchem co . ltd . rapidly developed to a big forest chemical co 兴湘林化公司产品的质量全部达到出口标准，并采用出口包装，远销欧美，深受国内外客户的青睐。
2.
The research information of the slab that has been used for forepassed decades is extremely few . there is a lack of the method of calculating load bearing capacity of slab with slightly curved bottom in our bridge criterion 在过去的几十年中，微弯板的研究资料极少，我国桥梁规范中尚无微弯板的承载力的确定方法。
3.
But in the forepassed research , the people all abstracted the colloid in the water as the sphericity and explained it by the known theory of the colloid chemistry . moreover some people modified the result by the grain coefficient in the derivation of theory . but this assume had more difference on the observed phenomena in the experiment , so it was not perfect in theoretical speaking 关于絮凝的理论基础在国外研究得比较多，但在过去的研究中，人们大都是将水中的胶体颗粒抽象为球形，用已有的胶体化学理论去加以解释，并在理论推导中引入颗粒系数加以修正，这与实际实验所观察到的现象有较大的差别，从理论上说，是很不完善的。
