The single phase kilowatt-hour meter is an often-used electrotechnical instrument to measure the active electric energy.

单相电度表是度量有功电能的常用电工仪表。

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The single phase kilowatt-hour meter is an often-used electrotechnical instrument to measure the active electric energy.

单相电度表是度量有功电能的常用电工仪表。

youdao