A lifebuoy is a type of water lifesaving equipment, usually made of cork, styrofoam, or other lightweight materials with a small specific gravity, and a canvas, plastic, etc., on the outside. A lifebuoy for swimming Xi can also be made of rubber and filled with air, also known as a rubber ring. In the market, there is a clear difference and use between swimming rings and lifebuoys. A lifebuoy is a type of water lifesaving equipment, usually made of cork, styrofoam, or other lightweight materials with a small specific gravity, and a canvas, plastic, etc., on the outside.
Simple classification of marine lifebuoys:
1. Integral lifebuoy :(lifebuoy manufactured by one-time integral molding process of the ring body)
2. Shell filling lifebuoy :(lifebuoy made by the process of integral molding of the ring shell and internal filling material)
3. According to the manufacturing process, the lifebuoy is divided into: type A - integral lifebuoy, type B - shell filled lifebuoy
