It is made of extremely rugged heavy-gauge black powder-coated steel.

它是由非常坚固重轨黑色粉末涂层钢板。

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A black staircase that winds up through the narrow home was lined with white powder-coated metal guards that are perforated.

一部黑色的楼梯蜿蜒通过狭窄的家，楼梯使用了白色涂层的金属穿孔板。

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These are wrapped in carbon nanotubes - tiny "straws" of pure carbon that are renowned for their electrical properties - and coated with a platinum black powder.

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