xiū lǐ / guǎn dào / shí / tā / yòng / dāi bān shǒu / nǐng jǐn / le / sōng dòng / de / luó mǔ修理管道时,他用呆扳手拧紧了松动的螺母。When repairing the pipe, he used an open spanner to tighten the loose nut.