Measurement of each additional voltage ratio on the same divider with the same applied voltage as in 1 1所述的同一測試電壓的同一分壓器的每一額外電壓比。
Measurement of emf of each additional voltage , from the same reference standard , of same nominal value 測量置于同一標準器具中,而標稱值相同的每一額外電動勢。
Additional voltage measurement at other frequency settings as well as frequency accuracy check may be offered at extra charge 本所亦可提供在其他頻率的電壓測量服務(wù)及頻率準確度檢查,但須另行收費。