All restricted areas must be fenced with a lock gate to prevent access by unauthorized persons.
All restricted areas must be fenced with a lock gate to prevent access by unauthorized persons.
所有限入区域必须围起来并配有门，锁以防止非指定人员进入。
All restricted areas must be fenced with a lock gate to prevent access by unauthorized persons.
所有限入区域必须围起来并配有门，锁以防止非指定人员进入。