If you took apart the plastic anti-theft tag on a DVD case, you'd find a thin piece of metallic glass that looks like aluminum foil.

如果你把一个DVD盒上的塑料防盗标签拆下来，你将会发现看起来像铝箔的一层很薄的金属玻璃。

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In valves, aluminum is mainly used AS an exterior trim component such AS a handwheel or identification tag.

在阀门上，铝主要作为外部装饰材料装饰部件，如手轮或铭牌等。

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For one thing, LaFollie relayed the serial number from the aluminum tag, a number Mann has never forgotten: 42023412.

WSJ: NY WWII vet receives long-lost dog tag from France