[{"title":"(2个子文件489KB)单片机晶振电路设计及布线指导","children":[{"title":"晶振外围电路的搭建与计算.docx <span style='color:#111;'>292.63KB</span>","children":null,"spread":false},{"title":"附件.docx <span style='color:#111;'>225.53KB</span>","children":null,"spread":false}],"spread":true}]