quaternary

• Quaternary environment of loess plateau and soil and water conservation
  黄土高原的第四纪环境与水土保持研究
• Test method for nonvolatile matter solids in fatty quaternary ammonium chlorides
  脂族季铵氯化物中不挥发物质
• Quaternary lacustrine outwash : significance to the western qaidam , china
  柴西第四纪湖泊冰水沉积的发现及意义
• Characteristic of quaternary period the earth crustal movement in sanjiang plain
  三江平原第四纪地壳运动特征
• Anti - swelling of bentonite re - modified by alkyl quaternary ammonium salts
  烷基季铵盐二次改性膨润土的防膨性能
• Study on gold stripping from gold - loaded quaternary amine by kscn
  用硫氰酸钾从季铵盐载金有机相中反萃金的研究
• Definition of quot; quaternary industry quot; and its impact on economic growth
  第四产业的内涵及对经济增长的影响
• Qpsk quaternary phase shift keying
  四相相移键控
• Dating methods used in quaternary noncohesive sedments and their usability
  第四纪沉积物常用测年方法及其适用性研究
• Test method for average molecular weight of fatty quaternary ammonium chlorides
  脂族季铵氯化物平均分子量的测试方法