gōng / zuò / rén / yuán / zhèng / zài / jiǎn / chá / suǒ / yǒu / xiāo / shòu / diǎn / de / shōu / yín / shè / bèi工作人员正在检查所有销售点的收银设备。The staff are checking the payment equipment at all the points of sale.