[{"title":"( 2 个子文件 33.88MB ) Core_v5.3 蓝牙5.3核心规范(中文版和英文版)","children":[{"title":"Core_v5.3.pdf <span style='color:#111;'> 26.97MB </span>","children":null,"spread":false},{"title":"BT_Core_v5.3-中文.pdf <span style='color:#111;'> 25.54MB </span>","children":null,"spread":false}],"spread":true}]