The paper introduced the installation of the node information table and the highdensitylayout of the fixed nodes in the heading roadway of the underground mine.
说明了节点信息表的设置和井下掘进巷道中固定节点的高密度布局；
2
Compare to those in plain city, there re characteristic differences such as highdensity and complex form of interchanges layout and form in Chongqing metropolitan area.