1On the night of February 9, 998, Georgian President Shevardnadze was on his way home in a Mercedes-Benz. Suddenly, more than 20 killers emerged from the dense forest under the cover of darkness, madly shooting at the presidential car and throwing grenades. The car was scarred, but fortunately Shevardnadze was unscathed, thanks to a Mercedes bullet-proof car worth 500,000 dollars given to him by the German government.
Extended data:
I. Place of use
Safety glass is usually used in some important facilities, such as bank gates, display cases of valuables, doors and windows of prisons and reformatories. These places may be constantly attacked by bandits with various weapons. High-strength safety glass can resist penetration for a period of time and win enough reaction time for other equipment. Some of the most famous cultural relics in the world, such as the Mona Lisa and the Declaration of Independence, are protected by safety glass.
Bullet-proof glass is made of multilayer glass and multilayer PVB intermediate film, or ordinary glass plus bullet-proof film, which can resist the strong impact of pistol, rifle and even bomb explosion. In the global city terrorist bombings, glass fragments are the main cause of personal injury.
When the explosion occurred, glass fragments rained around and even flew thousands of meters away, causing more than 90% of the injured. Even if the laminated glass is shattered in the explosion, it can still remain intact in the frame, which greatly reduces the harm of glass fragments to people.
Second, the identification method
1, the most important and safest way is to see if there is 3C certification mark on the safety glass. Because according to the regulations, there must be 3C certification mark on the safety glass.
Listen, that is to say, tap the glass with your hand. If the glass makes a crisp sound, it means that the glass is tempered glass, and vice versa.
3. With the polarizer, toughened glass can see colored objects on the edge of the glass through the polarizer, while black and white spots can be seen on the surface of the glass. Polarizers can be found in camera lenses or glasses. Pay attention to adjust the light source when observing, so that it is easier to observe.
Baidu encyclopedia-safety glass