gōng / chéng / shī / zhèng / zài / jiǎn / chá / shè / bèi / lǐ / de / zhěng / liú / qì / shì / fǒu / zhèng / cháng / gōng / zuò

工程师正在检查设备里的整流器是否正常工作。

The engineer is checking whether the rectifier in the equipment is working properly.