As luck would have it, I had nice black anodized aluminum sheet metal, perfect for engraving.

很有幸，我又很漂亮的黑色阳极电铝镀片材料，对于雕刻来说极为完美。

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Derusting, oxide skin removing and surface hardening for copper castings, sheet metal, stainless steel strips, aluminum castings.

铜合金铸件，薄板、不锈钢带、铝合金铸件除锈、除氧化皮及表面强化。

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For a fast dash of flash, top a dark countertop with a piece of hammered-aluminum sheet metal, available at home centers.

为了飞速闪亮的效果，在昏暗的厨房工作台面装上一个用金属做成的铝片，使它能在家的中心照明。

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For instance, when a product's aluminum surface is shrunk or bent, the amount of on-order aluminum sheet metal changes instantly.

FORBES: Easy Designer

In today's metal-based gadgets, you either need to bend a piece of sheet metal, or die-cast with an inferior alloy like aluminum or magnesium.

CNN: Next iPhone may be housed in 'Liquidmetal'