Chinese ⇄ English

当功率因数在滞后1 ~0,5变化时,功率计在满标度的二分之一处的误差变化不应大于满标度的0,25%
gen.	the error of a wattmeter at half full-scale shall not vary by more than 0. 25% of full scale for Precision instruments when the power factor is varied between unity and 0. 5 lagging