gōngchéngshī / gēnghuàn / le / mósǔn / de / pēnzuǐ / jǐchūjī / hěnkuài / huīfù / le / zhèngchánggōngzuò

工程师更换了磨损的喷嘴，挤出机很快恢复了正常工作。

The engineer replaced the worn nozzle, and the extruder soon returned to normal operation.