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要用同一支溫度計在全國各個地區量測氣溫,用水銀溫度計肯定不行,要用酒精溫度計(在標準大氣壓下量測上限不超過78.3℃)、鉑電阻溫度計或電晶體作敏感元件的溫度計,後兩者的量測範圍和精度要優於酒精溫度計,尤其是鉑電阻溫度計可以作為計量標準器具.
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