The number of grains in active regions of devices can be made uniform by making the grains of crystalline semiconductor films, obtained by thermal crystallization using a metal element, smaller. In the event of an interruption in the production of pig iron or primary steel products, the at least one reduction unit is emptied and the at least partially reduced charge materials are introduced into at least one vessel and kept under a non-oxidizing shielding gas atmosphere. The linear moving mechanism includes a rotatable part rotatably disposed on one of the two casings, a guiding part eccentrically mounted on the rotatable part, a link having a depression portion, and a pivotal connection part. Similarly, some columns that have a tendency to swell in the presence of aqueous solutions and pressurized while the solution is applied to prevent swelling and wall effect. The arrangement furthermore comprises a lifting mechanism 82a) connected to the rotatable bed base parts supporting the mattress, the mechanism 82a) being operatively connected to a safety hook, that can be connected to a lifting sling, for example, which is worn by the person. The connection unit electrically connects the rear cover to an exposed end of the conductive film which is exposed on the edge surface.