주기성,periodicity Copy: 주기성,periodicity has comma Hide Show Revision History Ver.DateChangesEditorCompare View 1.32023-10-20 05:16:02 +1-1user1 view source 1.22023-10-20 05:15:01 +1-0user1 view source diff 1.12023-10-20 05:14:09user1 view source diff {CREATE}