Split the working area by warning card before starting work, to avoid damage caused by entrance of passersby.

用警示牌将工作区域分隔起来，以防过路者闯入造成损伤。

youdao

Split the working area by warning card before starting work, to avoid damage caused by entrance of passersby.

用警示牌将工作区域分隔起来，以防过路者闯入造成损伤。

youdao