shīgōng / xiànchǎng / de / lóngménjià / jīngguò / ānquán / jiǎnchá / hòu / cái / yǔnxǔ / tóurù / shǐyòng

施工现场的龙门架经过安全检查后，才允许投入使用。

The gantry at the construction site was only put into operation after passing a safety inspection.