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2. Cummins B Series engine - Wikipedia

   en.wikipedia.org/wiki/Cummins_B_Series_engine

   The 3.9-liter 4B/4BT/4BTA Cummins is categorized under the B Engine family alongside the 5.9-liter 6B/6BT/6BTA Cummins diesel engines. The 3.9 is an inline four-cylinder , either naturally aspirated (4B) or turbodiesel (4BT/4BTA), which was popular for many step van applications including bread vans and other commercial vehicles.

3. Cannelure - Wikipedia

   en.wikipedia.org/wiki/Cannelure

   In modern bullets, such as the 7.62 illustrated here, the cannelure is pressed into the circumference of the bullet to provide a strong purchase for the mouth of the cartridge case when it is crimped onto that cannelure. This is done to prevent the bullet from moving either forward or backward in the case. [4] [5]

4. Silencer (firearms) - Wikipedia

   en.wikipedia.org/wiki/Silencer_(firearms)

   Sonic boom – sharp bullwhip-cracking sound associated with high-frequency shockwaves caused by an object (in this case, the bullet) flying supersonically through the air; Mechanical noise generated by the internal moving parts of the firearm action; A silencer can affect only the noise generated by the muzzle blast. Revolver with suppressor.

5. Sandbag - Wikipedia

   en.wikipedia.org/wiki/Sandbag

   Sandbags can be used to build levees, barricades, dikes and berms to limit erosion from flooding. Sandbags can also be used to fortify existing flood control structures and limit the effects of sand boils. Sandbag structures do not prevent water seepage and therefore should be built with the central purpose of diverting flood water around or ...

6. Bullet trap - Wikipedia

   en.wikipedia.org/wiki/Bullet_trap

   A bullet trap (or pellet trap when used specifically for air guns) is a device to stop and collect projectiles fired at a shooting range to prevent overpenetrations and stray shots. Bullet traps typically use friction , impact or gradual deceleration to stop bullets.

7. Rim (firearms) - Wikipedia

   en.wikipedia.org/wiki/Rim_(firearms)

   [6] [7] The .440 Cor-Bon is another cartridge with a rebated rim the same diameter as the .44 Magnum. The FN 5.7×28mm (used in the FN Five-seveN semi-automatic handgun and FN P90 personal defense weapon) is a well-known cartridge with a slightly rebated rim, but the reason for the choice is not clear, as there is no other cartridge it is known ...