| http://www.w3.org/ns/prov#value | - Other similar arrangements can be envisioned whereby chemicals are selectively mixed to produce heat, light, smoke or other byproduct, and the structure is retained on a surface by the electric charge carried by the film material 10. [0050] Any of the features of one of the embodiments disclosed above can be combined with one or more features of one or more other embodiments disclosed above.
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