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YouTubeClickmind
Let's Blast! - Industrial Explosives During Blasting #Engineering
Are civil and military explosives the same? In other words, are we using the same explosives in mining and warfare? Well, yes and no. From the ninth century AD (though the historians are still uncertain about the exact date of its invention) to the mid-1800's, black powder was the only explosive available. A single type of explosives was ...
已浏览 1009.6万 次2018年9月12日
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