窒息、被困、受伤、被淹和中毒——这些只是消防队员在实施密闭空间救援时面临的部分危险。密闭空间可被界定为任何房间、油/水箱、罐体、深坑、管道、烟道、隧道、挖掘出的洞、发酵池、机井。同样,它还可以是下水道、竖井、地下公用管道、锅炉、料斗、筒仓、涵洞、管路、钻孔、检修孔、化粪池、地窖或掩体。这些密闭空间内常常充斥着各种致命的混合物。 Suffocation, trapped, wounded, flooded and poisoned - these are just some of the hazards firefighters face when implementing confined space rescue. Confined spaces can be defined as any room, oil / water tank, tank, pit, pipe, flue, tunnel, excavated hole, fermentation tank, machine well. Likewise, it can be a sewer, a shaft, an underground utility pipe, a boiler, a hopper, a silo, a culvert, a pipe, a bore hole, a manhole, a septic tank, a cellar, or a bunker. Often filled with deadly mixtures in these enclosed spaces.