Another consideration is the relationship. between insulation class, temperature rise, and ambient temperature. The insulation. class rating designates the maximum. operating temperature for a winding. The. temperature rise is the difference between the.
China claims it has discovered the world's largest hole, and it's in one of the most dangerous places on the planet. 1  Jul.  Good news: China claims it has discovered the world's largest hole. On Wednesday, state broadcaster CCTV announced that the newly found dragon's hole, a 984-foot (300-meter) cavern in the disputed waters of the South China Sea, is now the world's largest hole.
Part of these reefs is the ever famous Belize Great Blue Hole, a large underwater sinkhole almost perfectly circular in shape, over 300 meters (984 ft) across and 125 meters (410 ft) deep. It's rated one of the Top 10 Dive Sites in the World and a Must Dive on most diver's list of dive destinations.