gōng / zuò / rén / yuán / gōng / shēn / jìn / rù / dī / ǎi / de / dòng / kǒu / jiǎn / chá / lǐ / miàn / de / shè / bèi

工作人员躬身进入低矮的洞口，检查里面的设备。

The staff member bent down to enter the low cave entrance and inspect the equipment inside.