wéi xiū rén yuán / zhèng zài / jiǎn xiū / xuán zhá / yǐ / què bǎo / qí / yùn zhuàn / zhèng cháng

维修人员正在检修旋闸，以确保其运转正常。

Maintenance workers are overhauling the rotor sluice gate to ensure its normal operation.