tracer管 （240） 20

15 secs

1 min 38 secs

20 secs

1 min 8 secs

8 mins 45 secs

1 min

6 secs

5 mins 8 secs

5 mins 18 secs

4 secs

24 secs

8 mins 25 secs

8 mins 55 secs

1 min 52 secs