环-链互变异构现象

The forming mechanism of dihydrophenophosphazine by the interaction of Ph〓NH and PCl〓 was studied, and the possible forming mechanism of spiro phosphonium chloride in the same reaction system was also proposed.

讨论了二苯胺与三氯化磷的成环机理以及反应过程中螺磷杂环化合物的形成机制，提出5，10-二氢磷杂吖嗪-10-氧化物存在类"烯醇—酮式"互变异构现象。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。