网站首页 词典首页
Synthesis of o phenylenediamine from o nitroaniline by catalytic hydrogenation at lower pressure was studied.
以邻硝基苯胺为原料,采用低压催化加氢还原技术合成邻苯二胺.
互联网
英汉双解词典包含4367426条英汉词条,基本涵盖了全部常用单词的翻译及用法,是英语学习的有利工具。