Abstract: A first hinge 11 comprises: a first turning shaft portion 111 which extends vertically; a first supporting portion 112 which is extended longitudinally and laterally, and supports the bottom of the first turning shaft portion 111; and a first mounting portion 113 which extends downwardly from the rear end of the first supporting portion 112. A second hinge 12 comprises: a second turning shaft portion 121 which extends vertically; a second supporting portion 122 which is extended longitudinally and laterally, and supports the top of the second turning shaft portion 121; and a second mounting portion 123 which extends upwardly from the rear end of the second supporting portion 122. The first supporting portion 112 is disposed above the second supporting portion 122. The first mounting portion 113 is disposed below the second supporting portion 122. The second mounting portion 123 is disposed above the first supporting portion 112.

Abstract: A first hinge 11 comprises: a first turning shaft portion 111 which extends vertically; a first supporting portion 112 which is extended longitudinally and laterally, and supports the bottom of the first turning shaft portion 111; and a first mounting portion 113 which extends downwardly from the rear end of the first supporting portion 112. A second hinge 12 comprises: a second turning shaft portion 121 which extends vertically; a second supporting portion 122 which is extended longitudinally and laterally, and supports the top of the second turning shaft portion 121; and a second mounting portion 123 which extends upwardly from the rear end of the second supporting portion 122. The first supporting portion 112 is disposed above the second supporting portion 122. The first mounting portion 113 is disposed below the second supporting portion 122. The second mounting portion 123 is disposed above the first supporting portion 112.

Abstract: An optical transmission apparatus that improves optical transmission quality by performing an optical noise correction and optical level detection with great precision. A first optical amplifier performs optical amplification with an optical fiber transmission line as an amplification medium. A second optical amplifier inputs second excitation light into an amplification medium in which an active substance for optical amplification is doped to perform optical amplification. A first optical level detector monitors, before transmitting an optical signal, a level of optical noise scattered by the first optical amplifier by emitting first excitation light in an operating environment and detects an optical level at the time of transmitting the optical signal by subtracting the level of the optical noise from a signal amplified by the first optical amplifier.

Abstract: A casing unit (8) with built-in ionizer (7) and blower (21) is integrated with a control panel (6) so as to emit plus ions and minus ions into an outside-refrigerator living space around the front side of the refrigerator, and an ionized air discharge port (11) is disposed in the front side thereof, whereby suspended bacteria in the outside-refrigerator living space are sterilized to provide a hygienic living space. Concurrently, suspended bacteria intruding into the inside of the refrigerator from the outside when the door is opened can be excluded to realize a hygienic inside-refrigerator environment.

Abstract: An optical transmission apparatus that improves optical transmission quality by performing an optical noise correction and optical level detection with great precision. A first optical amplifier performs optical amplification with an optical fiber transmission line as an amplification medium. A second optical amplifier inputs second excitation light into an amplification medium in which an active substance for optical amplification is doped to perform optical amplification. A first optical level detector monitors, before transmitting an optical signal, a level of optical noise scattered by the first optical amplifier by emitting first excitation light in an operating environment and detects an optical level at the time of transmitting the optical signal by subtracting the level of the optical noise from a signal amplified by the first optical amplifier.