| 换气率测定方法 | |||||
| This method measures the air change rate of the std type oven as follows: | |||||
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| where: | |||||
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X: Power consumption during air change (W) Y: Power consumption during no air change (W) V: total volume of oven (cm3) D: Density of oven ambient air (g/cm3)  T: Temperature difference inside/outside oven (°C)
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