double-insertion管 （823） 4

5 mins 11 secs

12 mins 16 secs

12 mins 16 secs

6 mins 22 secs

6 mins 28 secs

10 mins 33 secs

8 mins 24 secs

12 mins 22 secs

12 mins 22 secs

5 mins 31 secs

5 mins 25 secs

20 mins 52 secs

43 secs

11 mins 42 secs

12 mins 3 secs

12 mins 24 secs

3 mins 25 secs

1 min 10 secs

1 min 8 secs

1 min 9 secs

2 mins 1 sec

2 mins 3 secs

30 secs

17 mins

46 secs

16 secs