结构形式: 球轴承是由四个根本元件组成:滚珠(ball)、内环(inner ring)、外环(outer ring)与连结器也叫连结架(cage or retainer)。 滚子轴承是由短圆柱、圆锥或腰鼓形滚子作滚动体的滚动轴承。
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学习攀岩,享受美好的户外环境。
Learn rock climbing and enjoy the great outdoor environment.
世界各国政府必须制定法律来保护国内外环境。
It is imperative that governments around the world should enact laws to protect the environment both at home and abroad.
在今年新冠肺炎的情况下,我们会尽最大努力为顾客创造一个安全的户外环境。
We'll try our best to create a safe open-air environment for our customers under the circumstances of COVID-19 this year.
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