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Originally Posted by Roland_M
Hi Fernando,
it's the same in Germany. We call it blood groove (Blut-Rinne). I think this term was invented by civilians or maybe authors of adventure books about war. My own father is one of the people which really believe, that the groove was made to led the blood away from body with more efficiency or similar stupid stuff.
Roland
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This is a commonly held belief especially amongst those who have been in the armed forces. It is usually a fantasy promulgated by macho training sergeants to young recruits to scare or impress them ... even I was told this in the 1970s by several NCOs when I was in the Joint Services .