gōng / rén / yòng / gāng / qū / chǐ / lái / jiǎn / chá / qiáng / jiǎo / de / jiǎo / dù / shì / fǒu / zhèng / què / 。

工人用钢曲尺来检查墙角的角度是否正确。

Workers use a steel set square to check whether the angle of the wall corner is correct.