Introduction to Marine Resources
All the resources on the land are widely known, and all kinds of resources are nearly exhausted by the continuous development and use of human beings. Human beings began to focus on the sea. The sea is the source of life, covering an area of about 362000000 square kilometers, accounting for 71% of the earth's surface area. All kinds of resources are countless times more than those on the land. However, due to the blocking of sea water, the exploitation of marine resources is far more difficult than that of land resources. All the exploitation of marine resources can only rely on various mechanical equipment for exploration and exploitation. As most of the marine resources are sunk in the seabed, the equipment for exploiting marine resources cannot be separated from a series of equipment such as reel, take-up and winch. The conductive slip ring, as the core component of drum, take-up and other equipment, has been widely used in marine resource mining equipment.