<meta name="description" content="VVF・CVV・EM・AZなど各種ケーブルの電圧降下率と必要断面積を自動計算。スマホ対応の無料電線計算ツール keisou-lab。計装士・電気工事士・設備設計者向け。" />
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Nov 8, 2025 - HTML
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keisou-lab
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<meta name="description" content="VVF・CVV・EM・AZなど各種ケーブルの電圧降下率と必要断面積を自動計算。スマホ対応の無料電線計算ツール keisou-lab。計装士・電気工事士・設備設計者向け。" />
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Updated
Nov 17, 2025
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