ech

例句:

• THF copolymerized GAP is synthesised by the azidation of hydroxyl THF - ECH copoyethers.
  b.端羟基THF - ECH共聚醚叠氮化生成THF共聚 型GAP粘合剂.
  
• The applications of ECH in drug synthesis and GLD in some organic synthesis were reviewed.
  综述了ECH在药物合成以及GLD在部分有机合成中的应用.
  
• In the test , the toluene content in cyclic ECH was increased step by step.
  通过色谱分析,发现回收环氧氯丙烷(ECH)中甲苯含量在逐步升高.