小荡货好紧好爽奶头大视频,小辣椒福利视频导航,桃花影院,无码人妻久久一区二区三区免费丨

Tungsten alloy shot is used as the shot of shotgun. A shotgun is a firearm that is usually designed to be fired from the shoulder. The shot pellets from a shotgun spread upon leaving the barrel, and the power of the burning charge is divided among the pellets, which means that the energy of any one ball of shot is strong. In a shoting context, this makes shotguns widely used in military since  World WarⅡ.

High density, great hardness and resistance to high temperature make tungsten to be one of the most sought-after materials for shotgun pellets in shooting history. The density of tungsten is about 18g/cm3, only gold, platinum, and a few other rare metals have a similar density. So it is denser than any other shot material, including lead, steel or bismuth. Another unique property of tungsten is that it is non-toxic, it is friendly to the environment, so it is safe for people to handle and work with.