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Invisible Fence Inc. (commonly referred to as Invisible Fence Brand) is a company that designs radio pet fences for cats and dogs. Manufactured and distributed by Radio System Corporation, the company sells wireless and fenceless systems that were first introduced in 1973. [ 1 ]
Other pet fences are wireless. Rather than using an underground wire, they emit a radio signal from a central unit, and activate when the pet travels beyond a certain radius from the unit. In another type, the collar uses GPS signals to determine proximity to a predetermined "virtual fence", without the need for any physical installation at all.
A "stun–lethal" fence may also consist of two fences; one set of wires forming a conventional pulsed DC non-lethal fence, the second set (interleaved with the first) forming a 6.6 kV AC lethal fence, energized when the DC fence detects an intruder. Alternatively it may consist of a single, AC or pulsed DC fence capable of running in "safe ...
König then started a careful breeding program using these dogs and crossed them with Kuvasz specimens, Newfoundlands, German Shepherd Dogs, Leonbergers, a Bernese Mountain Dog and an African hunting dog. After much work, the group was rewarded in 1922 when the first Hovawart litter was entered into the German Breeding Registry.
Fence panels are commonly constructed of either chain link or weld mesh. Temporary fencing in storage on a site in Switzerland . Temporary fencing is an alternative to its permanent counterpart when a fence is required on an interim basis when needed for storage, public safety or security, crowd control , or theft deterrence.
A beehive fence is a fence which is built to deter elephants based on their natural fear of bees. The fence is set up off the ground at chest height and contains hives spaced every 10 metres. [ 1 ] If an elephant disturbs the fence, then the hives shake and the bees become agitated, and the elephants are deterred. [ 2 ]
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