【Key words】 Orifice flowmeter； Straight length； Metering grade；
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metering grade
计量等级
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The accuracy grade of electric meters directly depends on the metering capability on harmonic power.
谐波功率的计量能力直接决定着电表的精度等级。
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Revenue-grade metering would encourage motorists to charge their cars overnight, rather than in the evening when the grid is at peak capacity.
FORBES: ComEd Wants To Know Where You're Charging Your Car
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