wéi xiū rén yuán / xiān / qīng lǐ / jiàn cáo / lǐ de / tiě xiè / zài / ān zhuāng / xīn de / píng jiàn

维修人员先清理键槽里的铁屑，再安装新的平键。

The maintenance worker first cleaned the iron filings out of the keyway and then installed a new parallel key.