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2x 74mm) in HO scale
or bearings
Model of an electric toothbrush in 1:12 scale
where one pipe is mounted inside another pipe
N Scale Spherical Tank 137m3 doll house 2x 74mm) in HO scaleModel of a spherical tank in N scale. This tank holds about 137m, or 65 tonnes, of LPG, LNG, Butane, Propane or any other liquified (pressurized) gas. This tank is 40mm in diameter and 46mm tall. Spherical tanks (also know as Horton Spheres) are used because the round shape has the lowest possible surface area to volume ratio and because this shape will distribute the stresses evenly. A cilindrical tank holding an equal amount of pressurized gas will