double-insertion管 （821）

11 mins 22 secs

3 mins

8 mins 56 secs

4 mins 59 secs

32 mins 57 secs

5 mins 22 secs

7 mins 39 secs

6 mins 21 secs

3 mins 47 secs

8 mins 44 secs

12 mins 22 secs

3 mins

12 mins 16 secs

12 mins 17 secs

5 mins 7 secs

5 mins 32 secs

55 mins 23 secs

27 mins 6 secs

12 mins 45 secs

10 mins 1 sec

2 mins 51 secs

8 mins 31 secs

1 min

1 min 6 secs

1 min 7 secs

29 secs

28 secs