Fourth we should enhance infrastructure for the securities market centring on putting an appropriate system in place.
第四，要加强以制度为主的证券市场的基础建设。
2
Centring around varieties of major parameters, this paper presents a new parametric stepped method about the CAD system of chamber blasting.
本文对峒空爆破断面布药计算机辅助设计参数驱动方法进行了探讨。
3
The use of the tapping chuck is particularly advantageous when working with the quick change system on drilling machines that allows to drill and tap in the same position without centring again.