The University of Adelaide employs a full-time staff of fire prevention professionals. They inspect all campus buildings and test and maintain all sprinkler（喷水灭火装置）systems, fire alarms, and fire extinguishers （灭火器）. They also provide educational programs on fire safety in the residence halls. Whenever you move to a new area, you should locate the fire alarm pull stations and the two exits nearest your room.

这是2018天津卷2阅读A的一个段格。不太明白 fire alarm pull station 是什么意思？