Isotonic exercises involve moving your joints and muscles rhythmically and repetitively through their ranges of motion using low resistance, while isometric exercises are static and require you to contract your muscles without joint motion.
Substations are normally outdoors and are enclosed by a wire fence. However in residential or high density areas, the substation may be indoors and housed inside a building to restrict the humming noise of the huge transformers. slide 2 of 6 View of a Substation
In a single story station, a tower-like structure is sometimes used for hose hanging. An occupied station will usually have a station alarm system for receiving and annunciating an alarm, and indications of where and what caused the alarm.However, sometimes the only alarm is a telephone that is rung in case of emergency.In a volunteer fire department where volunteers do not staff the station, the firefighters may be summoned to the fire station by siren, radio or pagers, making a station alarm system superfluous.n a single story station, a tower-like structure is sometimes used for hose hanging. An occupied station will usually have a station alarm system for receiving and annunciating an alarm, and indications of where and what caused the alarm.