一部分是一层被涂黑的金属层。
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.
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.
典型修理方法，如金属箔片修理法，树脂密封修理法，湿铺层修理法。
General repairs such as metal foil tape, resin sealing repair, wet lay up repair.
金属外边有一层银薄膜。
镀后的金刚石表面均被包裹了一层金属。
金属外边有一层银薄膜。
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.
在圆柱形绝缘体上沉积一层金属薄膜制成。
This is made by depositing a thin film of metal on a cylindrical insulating support.
在金属表面镀仿金层技术具有多方面的应用。
The technology of imitating gold coating on the surface of metal finds wide application.
以钢丝轮替代砂轮可进行清除金属表面体锈、旧漆层。
It can clear the rust and old oil paint with steel wire wheel.
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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