Fig. 7: Pulling out ice blocks from the hole using a pick. In the early days when fridges were not invented, the ice blocks were sold for cooling. DiveZone ice diving event, Lake Klöntal. — EXIF: Nikon D3; Δt=1/400 s; f=35 mm; f/10.0; ISO 200; 2014-03-01 11:15:23
