{"text_format":"3","workbook":"xlsx","n_sheets":1,"sheets":["时间频率"],"read":"whole","date_system":"1900"}

{"sheet":"时间频率","index":0,"n_rows":3,"n_cols":2,"rows_kept":3,"merged":[[0,0,0,1]]}
["获CNAS认可的计量校准项目  时间频率计量"]
["序号","标准名称"]
[1,"秒表检定规程"]