Never , under any circumstances , block up ventilators .
任何情况下都不要阻塞通风孔。
Specialized equipment includes stretcher chairs , portable ventilators , walkers , and rollators .
特殊的设备包括延伸椅子，便携式呼吸机，步行机及滚动助行架。
Using mobile phones near hospital beds or important equipment is dangerous and could switch off ventilators or disrupt pacemakers , dutch researchers said on thursday .
