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The Shang Ring is a novel disposable circumcision device. It consists of two concentric rings made of plastic. It is available as 32 sizes in China. This device minimizes bleeding and the need for sutures and scalpel cuts on the 

Refrigerant, which is the component that produces cool, crisp air in your home, is essential to any air conditioning unit. It will transform from a gas to a liquid at high pressure and will slowly absorb the warmer, thinner air