low detonation velocity explosives 低爆速炸药
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An FBI affidavit said the bombs contained "low-grade explosives" and a "large pyrotechnic" had been found at the younger brother's college dorm room in Massachusetts.
WSJ: Boston Bombing Suspects Roused by Jihadist Thought
Iraqi soldiers scan the waiting vehicles with an explosives detection device that looks like a weapon used by aliens in low-budget sci-fi films.
BBC: Viewpoint: Bad case of Baghdadophobia
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