瓦钉这是一种用于固定简瓦的瓦作构件。西周时期的瓦钉是略突出于瓦身的乳钉形式,与瓦同时烧铸面成,战国时期则出现了独立的瓦钉形式,并配置瓦钉。独立的瓦钉与瓦钉帽的配套形式,直到清代琉璃瓦中仍被使用,主要应用于屋顶上坡面较陡的位置及松部。
当利瓦伊·施特劳斯和裁缝雅各布·戴维斯把在工作服上打柳钉的程序申请专利时，他们便创造了世界上第一条牛仔裤。
When Levi Strauss and tailor Jacob Davis patented the process to put rivets in men's denim work pants, they created the world's first blue jean.
纳瓦兹医生表示，除了作为一个眼中钉，静脉曲张可以是痛苦的。
Dr Nawaz said that apart from being an eyesore, varicose veins can be painful.
基于其独特的水平打钉安装方式，金属瓦适用于各种建筑屋顶，包括高层建筑。
Windproof: It is suitable for all kinds of roof, including that of high buildings due to its special way of installation – to nail it horizontally.
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