Enclosures not made of stainless steel or aluminized steel must be coated with an epoxy coating.
若不使用前述材料，则金属必须涂覆环氧涂层。
The filter vessel should be made of stainless steel or the interior surface should be coated with an epoxy to prevent corrosion.
过滤器毂体应由不锈钢制成，或内表面要涂环氧树脂防止腐蚀。
Carbon Steel casings can be powder coated, or being painted with an Enamel or Epoxy Paint.
焊钢炭素图层管状框架包装外表有粉状图层、瓷釉土层或环氧涂层。
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