Water column meter - Water column meter
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A unit of pressure. The symbol is mH 2 O or mAq. 1mH 2 O = 9806.65 Pa (pascal). It means the pressure equivalent to a 1m column of water with a density of 1×10 3 kg/m 3 at the standard acceleration of gravity. In the past, the density was defined as 999.972 kg/m 3 , so there is a slight difference between the old and new definitions. It does not belong to the International System of Units (SI). → Meter of mercury Source : Heibonsha Encyclopedia About MyPedia Information |
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圧力の単位。記号はmH2OまたはmAq。1mH2O＝9806.65Pa（パスカル）である。標準の重力加速度のときに，密度が１×103kg/m3である水柱1mに等しい圧力を意味する。古くは密度に999.972kg/m3を用いて定義したため，新旧にわずかの違いがある。国際単位系（SI）には属していない。→水銀柱メートル
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