amendment 1 规范;叠层纸;层压纸板;绝缘材料;
Specification for pressboard and presspaper for electrical purposes;
amendment 1 规范;叠层纸;层压纸板;绝缘材料;
Specification for pressboard and presspaper for electrical purposes;
More serious is, partial manufacturer makes beehive shape material with presspaper actually, reoccupy glue is secured inside door plank.
更为严重的是,部分厂家竟然用薄纸板制成蜂窝状材料,用胶水固定在门板内。
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