A method of casting including coating at least a portion of a mold with a non-porous coating, placing the mold in a chamber capable of inducing pressure, and applying pressure to the chamber to press material into a cavity in the mold. In one embodiment, the present invention is comprised of an intermediate device such as, for example, a router. A focus position of the electron beam is controlled in accordance with the height detected. The dispersion slopes of the first optical fiber and the second optical fiber are of mutually opposite symbols. This seat comprises a first, a second and a third control member connecting the cushion to the backrest, one of the first, second and third control members being distinct from the other two. In one embodiment, the subject invention provides additives for marine paints and surface treatments.