quaternary

• Study on fully mechanized caving under porosity aquifer in quaternary period
  煤矿斜井架空人车自动控制装置的试验研究
• Quaternary information industry
  第四产业
• Quaternary information industry
  第四产业
• Test methods for acid value and amine value of fatty quaternary ammonium chlorides
  脂族季铵氯化物中酸值和胺值的测试方法
• Late quaternary stratigraphy and evolution of the changjiang delta , china
  晚第四纪古河口湾的发育及有关的资源环境问题。
• Study on toxicity and mutagenic effects of quaternary ammonium compound detergent
  季氨化合物洗消剂的毒性及致突变作用研究
• Preparation of stearic acid with heteropoly quaternary ammonium as phase transfer catalyst
  杂多季铵盐相转移催化制备十八酸
• Late - quaternary activity and slip rate of the western qinling fault zone at huangxianggou
  研究还揭示沿康西瓦断裂发育了一条长约
• Revelation of information on genesis of multi paleosol from quaternary loess profile
  第四纪黄土剖面多元古土壤形成发育信息的揭示
• Quaternary phase shift
  四相相移