0:05
Buffing machine revving a few times.
0:06
Buffing machine running, long.
0:03
Buffing machine running, short
0:01
Buffing machine revving.
0:08
Janitor's cart rolls on hard surface
0:09
Janitor's cart rolls on hard surface
0:08
Janitor's cart rolls on hard surface
0:09
Constant floor sweeping
0:15
Sweeping a factory floor, slowly.