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毫米汞柱

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水銀氣壓計

毫米汞柱(英語:Millimeter of mercury),符號為mmHg,是一種压强單位,舊定義:一毫米高的水銀柱對液柱底面產生的压强,現在定義:一毫米汞柱為133.322387415帕斯卡,約為1[1] 。 虽然毫米汞柱不是国际标准单位,但仍应用在气象、航空和诸多科学领域。粗略来说 1mmHg ≈ 1/760 atm101325/760 ≈ 133.322368 帕斯卡),尽管两个单位并不相等,但是相对差只有 0.000015%,对大多数应用场景来说可以忽略不计。

参见

參考

  1. ^ Conventional millimetres of mercury. [2014-11-25]. (原始内容存档于2013-10-05). 
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毫米汞柱
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