高性能をコンパクトに凝縮！ 明電 低圧～33kV回路用避雷器
配電用 特殊品 付属品 防食層保護用避雷器 形式名： zs-bca, zs-bcb 直流vcb消弧ユニット 形式名： zsd-b20t, zsd-b21t 動作回数表示装置
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