热处理、碳化、淬火硬化层，表面覆层，钢，有色金属，微小及薄形零件等。

Heat treated layer, carbonized layer, hardened hard layers, superficial coating, steels, non-ferrous metal, micro and thin shaped components.

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从表面淬火、表面扩散化学热处理和表面覆层强化三方面介绍了提高塑料模具使用寿命的表面强化技术。

Surface strengthening technologies are reviewed from the points of surface quenching, surface diffusion thermochemical heat treatment and surface coating.

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天花板上外露的混凝土表面和墙壁上点缀着木质覆层。

Exposed concrete surfaces on the ceiling and walls are interspersed with wooden cladding.

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You need to do that to be able to control the shield that's as big as that and as heavy as that, because it is made fundamentally of a heavy wood, typically covered by leather, sometimes with some bronze, a bronze sheet across the front of it as well.

如果你想自如操控这块盾牌就必须得这样,这种盾牌很大并且很笨重,因为它主要是由沉重的木材制成,表面一般覆有皮革,或包上铜皮,就是表面上有一层铜皮

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