基体材料：能在其上沉积金属或形成膜层的材料。
In its substrate material: can deposited metal or form membrane of the material.
在化学处理之前的表面准备，移除一层金属基材。
Surface preparation of metal before chemical process. Removal of a layer of the base metal.
一部分是一层被涂黑的金属层。
镀后的金刚石表面均被包裹了一层金属。
金属切削过程是切削层金属的塑性变形和断裂过程。
Metal cutting is the process of plastic deformation and fracture.
金属层（4）由莫氏硬度为3以下的金属形成。
The metal layer (4) is made by metal which murray rigidity is less than 3.
作为户外广告牌的金属保护层，美观耐用。
Can be the protection of the brand board outside door, attractive and durable.
作为户外广告牌的金属保护层，美观耐用。
Can be the protection of the brand board outside door, attractive and durable.
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