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  <loc>https://smartrise.vn/2026/05/04/bien-tan-thang-may-la-gi-vai-tro-quan-trong-trong-van-hanh-va-tiet-kiem-dien/</loc>
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   <news:title>Biến tần thang máy là gì? Vai trò quan trọng trong vận hành và tiết kiệm điện</news:title>
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