{"text_format":"2","workbook":"xlsx","n_sheets":3,"sheets":["Sheet1","Sheet2","Sheet3"],"not_rendered":{"charts":0,"images":0,"macros":0,"external_links":0,"defined_names":0,"comments":0,"pivot_tables":0},"unopened":[],"bounds":{"document_bytes":16777216,"sheet_cells":100000,"run_cost":"one","rows_first":2000,"rows_last":500,"rows_between":2000,"halvings":0,"cell_chars":16384,"cell_head_chars":4096},"cells_cut":0,"cells_raw":0,"read":"whole","date_system":"1900"}

{"sheet":"Sheet1","index":0,"n_rows":4,"n_cols":4,"rows_kept":4,"cut":false,"hidden":false,"merged":[]}
["原始版本","新发布版本","时间","更新记录"]
["M21_V101","V102","2021-01-13","初始测试版本"]
["V102","V103","2021-01-18","完善版本"]
["V103","V104","2021-01-22","1、工厂模式下修改为对应按键。\n2、重新定义按键，左侧F1 F2为调节声音大小。待机界面上下键为快捷群组成员\n3、去掉菜单里快捷界面设置"]

{"sheet":"Sheet2","index":1,"n_rows":0,"n_cols":0,"rows_kept":0,"cut":false,"hidden":false,"merged":[]}

{"sheet":"Sheet3","index":2,"n_rows":0,"n_cols":0,"rows_kept":0,"cut":false,"hidden":false,"merged":[]}