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<p>[QUOTE=&quot;dopeuser, post: 171568, member: 4130&quot;]The &#039;pattern&#039; is similar to what happens when you have sheets of wood or drywall, or something like that,</p><p>and your load them into a truck, sliding one sheet onto another, and you dont notice a little stone get in</p><p>between the sheets, untill youre unloading, and you slide off a sheet, and you see a scratch like that.</p><p>Its a distinctive pattern, in this case probably from swarf, turnings, burrs, or whatever you call it,</p><p>thats why you see 2 lines, one is the entry, the other the exit.</p><p>Sorry if this makes no sense, makes perfect sense to me, but I might not be explaining it right.[/QUOTE]</p><p><br /></p>

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