shī / gōng / rén / yuán / zhèng / zài / yòng / shuǐ / zhǔn / yí / jiǎn / chá / qiáng / jī / shì / fǒu / shuǐ / píng

施工人员正在用水准仪检查墙基是否水平。

The construction workers are using a spirit level to check whether the foundation is level.