water tight switch 中文意思是什麼
water tight switch
解釋
水密開關-
One end of the cable is permanently connected to the enclosed mercury switch and the entire assembly is encapsulated to form a completely water tight and impact resistant unit
電纜的一端永久性連接在封閉的水銀開關內,這個完整的密封總裝形成完全不透水、抗撞擊裝置。
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