Most of production are vended to occident, Europe and America, Japen, Korea, Southeast Asia, etc. 产品远销欧美、日本、韩国、东南亚等国际市场。
Steepest descent. The research of these problems has not been vended in the publication by now and the conclusions are not only brief and practicable but also the generation involving optimality conditions of Fritz John. 这些问题的研究至今为止还没有学者在刊物上公开发表过,所得到的结论不仅简洁、可行性强,而且是在可微情形下FRITZJOHN最优性条件的推广。