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The marks shown in the land of this bullet are known as striations. These striations are
unique and produced by the ....
bullet's manufacturing process.
gun barrel's lands.
resistance of the bullet as it passes through the barrel of the gun.
scratching of the bullet when being loaded.

The marks shown in the land of this bullet are known as striations These striations are unique and produced by the bullets manufacturing process gun barrels lan class=

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I believe it’s “resistance of the bullet as it passes through the barrel of the gun”
The answer is the resistance of the bullet as it passes through the barrel of the gun