| http://www.w3.org/ns/prov#value | - Further, the use of flexible foils or thin metal layers for electrodes 401a and 401b allows for rolling thick films or layers of the electrodes 401a and 401b and propellant 402 into spiral shaped structures as shown in FIG. 4.Additionally, the material of electrodes 401a and 401b, e.g., aluminum or other suitable material, may be consumed during combustion of propellant 402, thereby increasing the
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