Automatic governing test of voltage and frequency for main generator.

主发电机电压，频率自动调节试验。

youdao

Automatic governing test of voltage and frequency for main generator (emergency generator).

主发电机(应急发电机)电压、频率自动调节试验。

youdao

He said he was unsure whether the firing was from the Army or civilians but assumed the automatic fire could not have come from the Parachute Regiment because of the rules governing engagement in Northern Ireland at the time.

BBC: Heath unaware of risk to civilians