chemical dump

This paper discusses the function of CD optical pickup para me ter adjust equipment in the process of CD optical pickup assembly.

阐述了CD光学头参数评价系统在生产过程中的作用,较为详细地介绍了CD光学头参数评价系统的总体结构及各组成部分与原理,并对CD光学头参数评价系统在设计、开发及使用过程中的一些问题作了初步探讨。

This paper focuses on the technique requirements for disproportion synthesizing p cymene with monocyclic monoterperpene as raw material and CD molecular sieve as catalyst.

研究结果表明CD催化剂具有制备简单、价格低廉、回收简单、没有污染和腐蚀性等特点 。