gōng / chéng / shī / jiǎn / chá / le / zhuī / chǐ / lún / de / mó / sǔn / qíng / kuàng / yǐ / què / bǎo / shè / bèi / ān / quán / yùn / xíng

工程师检查了锥齿轮的磨损情况，以确保设备安全运行。

The engineer checked the wear on the pinion gear to ensure that the equipment operated safely.