State-of-the-art safe rooms include an independent phone line, a back-up generator, oxygen scrubbers to replenish the air supply, and closed-circuit television screens connected to computers.
State-of-the-art safe rooms include an independent phone line, a back-up generator, oxygen scrubbers to replenish the air supply, and closed-circuit television screens connected to computers.
最新式的安全密室有一根单独的电话线、备用发电器、补充空气的氧气更新器以及连接电脑的闭路电视屏。