标准内容 对照这个，就可以看出“bv”和“bvr”是什么意思了。 bv： b——按用途分，固定敷设用电缆（电线）； 铜导体省略； v——按材料特征分，绝缘聚氯乙烯。 bvr： b——按用途. Lesen sie § 27 ii.
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