最经典的数据库高级教材 数据库概念(第4版)实验 用于数据库学习和实验 强烈推荐-classic database senior materials database concept (Release 4) experimental database for the study and experiment strongly recommended
采用东芝TDA7495/TDA7496芯片(已经形成产品)制作的高保真立体声音频放大器原理图-Toshiba chips used TDA7495/TDA7496 (has been formed products) produced by high-fidelity stereo audio amplifier schematic