Barbed is a type of steel fencing wire constructed with
sharp edges or points arranged at inter..
It is also called a fall arrest net, common on sites in
urban centers adjacent to a working street...
An electric bell is a mechanical bell that functions by
means of an electromagnet. When an elec..
A fire alarm is a standalone device or a complete network of
devices, installed in a building or an..
Fire extinguisher, portable or movable apparatus used to put
out a small fire by directing onto..
A protective railing, as along a road or stairway or length
or width of a scaffolding. Railroads, a..
Security lighting is lighting that is intended to deter or
detect intrusions or other crimi..
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