What does diving mean?

Diving has many meanings: 1, which refers to the activity of entering the water surface without professional tools. 2. It is groundwater buried underground and above the first aquiclude. This is one of the sports events. 4. It refers to the individual behavior of secretly watching shared information or messages without the knowledge of others.

Drifting to the bottom of the sea is a long-standing wish of people. As early as 2,800 years ago, in the heyday of Mesopotamia, the armies of the Azria Empire washed the air with sheepskin bags and attacked the enemy from the water. This may be the ancestor of diving. In 1700 years ago, in China's history book "Biography of Japanese in Wei Zhi", there were already records of fishermen diving and fishing in the sea.

Today, the predecessor of professional diving is 160 years ago, the mechanical diving invented by Guo Mengbei in Britain to transport air from a water pump, that is, helmet diving.

This kind of diving first appeared in Japan at 1854. 1924 glass is used as a diving mirror, and a mask submersible is used to suck air from the water. This is the predecessor of scuba diving equipment.