The parameter design inve stigati on of inner roller of pyramidal pulverizer 锥磨型粉碎机内碾盘的参数化设计与研究
2.
According to the classification principles of lithological lineage units , the granitic rocks may be divided ( in descending order ) into zhongguanyingzi ( including xiyao and erdaogou units ) and yushulinzi ( including litaizi , nianpanshan and aobaoshan units ) super - units 按岩石谱系单位划分原则，由早到晚划分为中官营子和榆树林子两个超单元，前者由西窑单元、二道沟单元组成，后者由李台子、碾盘山和敖包山单元组成。
