非金属覆层 meaning in English

non metal lining
non-metallic coating

Metallic and non - metallic coatings - measurement of thickness - beta backscatter method
金属和非金属覆层.厚度测量.射线背散射法
Metallic and non - metallic coatings - measurement of thickness - beta backscatter method
金属和非金属覆层.厚度的测量.反向散射法
Standard specification for steel sheet , carbon , metallic - and nonmetallic - coated for cold - formed framing members
冷成形构件用金属覆层和非金属覆层的碳钢薄板的标准规范