| Artist | : | Washes gravel using a rotating drum and screening |
| Title | : | Unique Workers |
| Duration | : | 5 |
| Source | : | Youtube |
| Type of file | : | Audio/Video (.mp3 .mp4) |
| Artist | : | Washes gravel using a rotating drum and screening |
| Title | : | Unique Workers |
| Duration | : | 5 |
| Source | : | Youtube |
| Type of file | : | Audio/Video (.mp3 .mp4) |