The forming technology and the forming die of each working process for the closingring were analyzed.
分析了卡圈成形工艺及各单工序成形模具特点。
2
Alongside, the chemical reactions for the key steps in this synthesize process i. e, the condensation, decomposition, ring-closing, separation, etc. are given.
给出了合成过程中缩合,分解、闭环,离析等关键步骤的化学反应;
3
The five quinazoline compounds were prepared by using 2 amino 4,5 dimethoxy benzoic acid as original material, which underwent ringclosing, halogenation and substitution.