wéi xiū / rén yuán / chāi xià / mó sǔn / de / jī zhóu / jiǎn chá / zhóu chéng / shì fǒu / xū yào / gēng huàn

维修人员拆下磨损的机轴，检查轴承是否需要更换。

The repair technician removed the worn machine shaft and checked whether the bearing needed replacing.