... Optical Density（OD）：光密度 metal Crown Lid：皇冠盖 Blanket：隔氧层 ...
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Metal l Crown Lid 皇冠盖
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Domestic condition of metal crown lid was analyzed, and the difference of metal crown lid between domestic and abroad in material, mould, and facilities was put forward.
分析了皇冠盖的国内现状，指出了国内皇冠盖在材料、模具以及生产设备上与国外的差距。
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