搜索 - 科创

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11000 薰衣草油 CP 100ml 北京 123.5511001 亚氨基二丙腈固定液 100ml 天津 21.0011002 亚氨基二丙腈色固 100ml China 16.1711003 亚...

本帖在拆机栏目还有一篇对应的整机拆解，这里只是维修过程的描述。III. 维修3.1 概述大多数ham应该都认同ESH3是一台设计漂亮的接收机，同时ESH3也具备比较优良的技术指标，但这并不代表它...

本文以苯甲醛PhCHO、过量苯乙酮PhCOCH3为原料，40%碱液为催化剂，乙醇为溶剂，加热回流合成1,3,5-三苯基-1,5-戊二酮，即PhCH(CH2COPh)2注：本文中Ph表示苯基，即C6H5...

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