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The sale of metal detectors is allowed in France. The first use of metal detectors in France which led to archaeological discoveries occurred in 1958: people living in the city of Graincourt-lès-Havrincourt who were seeking copper from World War I bombshell with military mine detector found a Roman silver treasure. [21]
A long-range locator is a class of fraudulent devices purported to be a type of metal detector, supposedly able to detect a variety of substances, including gold, drugs and explosives; most are said to operate on a principle of resonance with the material being detected.
These 51-to-127-millimetre (2.0 to 5.0 in) blades are fixed to the topmost part of the pen, hidden inside a hollow cap, serving as both the pen's end and the knife's sheath. Common blades may be the single-edged thrusting type or the double-edged dagger type, or even an unsharpened stiletto type point that can only thrust.
Another source estimates that a 100 m long and 10 m wide submarine would produce a magnetic flux of 13.33 nT at 500 m, 1.65 nT at 1 km and 0.01 nT at 5 km. [6] To reduce interference from electrical equipment or metal in the fuselage of the aircraft, the MAD sensor is placed at the end of a boom or on a towed aerodynamic device. [7]
ShotSpotter was founded by Robert Showen in the 1990s while he was working for SRI International.He created a company in 1996 and tested prototypes in Redwood City, California.
A baton (also truncheon, nightstick, billy club, billystick, cosh, lathi, or simply stick) is a roughly cylindrical club made of wood, rubber, plastic, or metal. It is carried as a compliance tool and defensive weapon [ 1 ] by law-enforcement officers , correctional staff , security guards and military personnel .
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