Metal Detectors to Get That Rare Find
August 15, 2010 by
Filed under metal siding
The first metal detector was invented by Alexander Graham Bell in the year 1881, just after the invention of telephone in 1876. Later, Fischer came out with a portable one in the year 1931. Today, metal detectors are used in many fields starting from treasure hunt to security purposes.
These are electronic devices and are used [...]