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環境測試（IP 測試、空調測試）
IP 防護等級是由國際電工委員會 IEC 公布的一種防護等級，表示電氣或機械設備對水、粉塵或外部沖擊的抵抗能力。? IP 通常有兩個數字（例如 IP65）。第一個數字表示對固體的防護等級，第二個數字表示對液體的防護等級。?
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