Abstract: An antenna device includes: a plurality of element arrays; a mast member which holds the plurality of element arrays such that the element arrays are arranged in a direction perpendicular to a reference plane; and a first feeding circuit which feeds the element arrays, wherein each element array comprises: a predetermined number of dipole antennas; and a second feeding circuit which feeds the predetermined number of dipole antennas such that the predetermined number of dipole antennas can transmit and/or receive predetermined circularly polarized wave components alone, for each of the element arrays, the first feeding circuit and the second feeding circuit of the element array are connected through an independent transmission path, and each element array is fed with a predetermined phase difference.

Abstract: In a continuous-casting machine, a device for cutting a casting synchronously with the traveling speed of the casting is mounted above a conveyor table extending horizontally beyond casting withdrawal guide rollers. The cutting device has a temperature maintaining cover that covers the casting on the conveyor table, moving with the cutting device proper along the conveyor table.