Dial is aluminum oxide printing plate, the surface clear and beautiful style.

标度盘是铝氧化印刷盘，表面清晰式样美观。

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That is why aluminum is so expensive because the oxide is so stable.

这就是为什么铝这么贵，因为氧化物稳定。

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That is why aluminum is so expensive because the oxide is so stable.

这就是为什么铝这么贵，因为氧化物稳定。

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