2017 1
2017 3
3 6
1 3 ~6 2
2
3
1 3 6
2
3
4
5
1
2
3
3 6
1
2
3
(1
(2
(3
4
5
6
2017.6 2017.9
2017.9 2018.2
2018.3 2019.12
2020.1 2020.6
1 2 4
2
3
2017 11 1