Surface preparation of metal before chemical process. Removal of a layer of the base metal.
在化学处理之前的表面准备，移除一层金属基材。
A new processing preparation that sprays vapoured sol on the surface of heating material is adopted, which not only shortens time, but also gets a relative sinterability powder.
雾化钛酸钡锶溶胶，溶胶粒子在加热基体上快速凝胶，不仅缩短粉体的制备时间，而且制得粉体的粒径均匀。
This preparation consists of sanding away any paint or rust to obtain a smooth but not highly polished surface.
准备工作包括用砂纸打磨，除去油漆和锈迹，以使表面光滑但又不抛得很光。
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