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| My Favorite Plastic Explosives |
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| 4 January 2010, Cervera de los Montes |
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| A4 (29,7 x 21,0 cm) |
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| Ballpoint pen and felt-tip pen on paper |
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Plastic explosive, invented by Alfred Nobel in 1875, is a specialized form of explosive material. It is soft and hand moldable solid material. Many terrorist groups have used plastic explosives, especially Semtex and C-4.

 Helsinki Art Museum. |
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