| http://www.w3.org/ns/prov#value | - Additionally, the machine can also measure how electrons pass through or become absorbed by different materials, giving them the ability to also detect explosives and other types of contraband. ???We can use the muons to measure density, we can use the electrons to measure chemistry and if you think of those two things on an XY plot, materials tend to differentiate themselves pretty well in XY spa
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