High Explosive 1
High Explosive 1 : (Civ Eng; Techn) An explosive that detonates, rather than deflagrates or burns; that is, the rate of advance of the reaction zone into the unreacted material exceeds the velocity of sound in the unreacted material. See: Low Explosive. Note: High explosives are divided into two classes: primary high explosives, and secondary high explosives, according to their sensitivity to heat and shock. Whether an explosive reacts as a high explosive or as a low explosive depends on how it is initiated and confined
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