Mùgōng / bǎ / qiānchuí / xuán / zài / qiángmiàn / qián / yònglái / jiǎnchá / lìzhù / shìfǒu / chuízhí

木工把铅锤悬在墙面前，用来检查立柱是否垂直。

The carpenter suspended a plumb bob in front of the wall to check whether the post was vertical.