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来自维基百科,自由的百科全书
毫米水柱,符號mmWG、mmWC、mmH2O,是一種較為少見的壓力單位,定義為標準重力加速度下4℃(水密度最大,約為999.9720kg/m3)時1毫米高水柱產生的壓力,約是9.80638帕。但計算時常採用水的密度為1000kg/m3,也就是1毫米水柱等於9.80665帕。[1]
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