The charm is attached to a cord using a metal ring and cylinder and included with the sets as a separate accessory that children can attach to the toy necklace, bracelet or key chain.
该小挂件用一个金属环和小圆柱附在一根绳索上，并且包括在该套件中作为一个儿童可以附在玩具项链、手链或钥匙链上的分离的附加物。
The steel ring is the key component of metal V-belt, its main failure is fatigue rupture.
带环是金属带中的核心部件，其主要失效形式是疲劳破坏。
Steel ring is a key part of metal V-belt; the load distribution on its has a great influence on its driving capacity and its service life.
钢环组是金属带的关键组件之一，它的载荷分布关系到金属带的承载能力和使用寿命。
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