The establishment and existing problems of metallurgy model standard for an aeroengine are introduced.
介绍了某型航空发动机冶金型号标准的编制情况及其尚存在的问题。
We start with the problems existing in equity theory of present accounting in chapter four. Then we study some problems such as establishment and distribution of human capital equity.
第四章从现行会计的权益理论中存在的问题入手,研究了人力资本权益的确立和人力资本权益分配等问题。
The establishment of reaction kinetic models on molecular scale is very difficult for many complex reaction systems existing in petroleum processing.
石油加工过程中存在大量的复杂反应体系,建立这些过程的分子级的动力学模型十分困难。
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