formation skeleton 地层骨架
The key reactions included the formation of 9, 15-cyclopropyl function and double bond migration in the a ring to reestablish the GA skeleton.
本合成工作的关键为9,15环丙基的形成及在重建GA骨架时a环中双键的重排反应。
After analysing the features of the structure of current coil skeleton parts and material formation, the paper introduces the injection die design method of this part.
分析了电流线圈骨架零件的结构特点及材料成型特点，介绍了该零件的注射模具设计方法。
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