摘要 |
The reduced scale model airships e.g. from O to 30 metres long are proposed for use inside or outside buildings. The airships use electric propulsion and are controlled remotely using electronic systems. - The airships are designed to carry logos, advertising material or illuminated signs on their sides. The signs may be either fluorescent or phosphorescent. The airships do not carry any fuel and are not designed to carry people.
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