How internal bleeding leads to black diarrhea. Black diarrhea is made up of digested blood. When you have black diarrhea from internal bleeding, it means that the bleeding likely happened high up in your digestive tract. When you bleed in your food pipe or stomach, you donât always vomit blood.
GG - Government Grade, All Acronyms, viewed April 15, 2017, <https://www.allacronyms.com/GG/Government_Grade>.
The origin of the RG designations is in old, long-obsolete military specs; RG stands for Radio Guide, and the RG numbers are completely arbitrary. Most cables today are referred to as RG-# type, meaning that they don't strictly conform to the original Radio Guide specifications.