Abstract: An input device, wherein the screen (18a) of a display device (18) is divided into two regions, a region (A1) and a region (A2), and the icon switch displayed in the region including the position of an invisible pointer (P?) is selected. Thus, one of an icon switch (1) and an icon switch (2) that are displayed on the screen (18a) is selected at any time. Consequently, the user will no longer have to watch the screen carefully and perform an operation for moving an instruction marker such as a visible pointer to a desired icon switch, for example as in conventional devices. Accordingly, the user can enter a desired instruction in a short time by selecting a desired icon switch in a short time.

Abstract: An input device, wherein the screen (18a) of a display device (18) is divided into two regions, a region (A1) and a region (A2), and the icon switch displayed in the region including the position of an invisible pointer (P?) is selected. Thus, one of an icon switch (1) and an icon switch (2) that are displayed on the screen (18a) is selected at any time. Consequently, the user will no longer have to watch the screen carefully and perform an operation for moving an instruction marker such as a visible pointer to a desired icon switch, for example as in conventional devices. Accordingly, the user can enter a desired instruction in a short time by selecting a desired icon switch in a short time.

Abstract: An internal cleaning apparatus includes a rotary shaft which, having a liquid flow passage, is provided so as to be axially rotatable, a revolving rotary shaft which, having a liquid flow passage connected to the liquid flow passage and being provided in a direction substantially perpendicular to the rotary shaft, is installed so as to be revolvable about the rotary shaft and axially rotatable, and a nozzle provided at a leading end of the revolving rotary shaft, wherein a gas flow passage is provided along the liquid flow passage of each of the rotary shaft and the revolving rotary shaft from a gas inflow opening provided in the rotary shaft, wherein a configuration is such as to eject a gas-liquid mixture flow having a gas supplied from outside the object to be cleaned mixed with the liquid ejected from the nozzle.

Abstract: An internal cleaning apparatus includes a rotary shaft which, having a liquid flow passage, is provided so as to be axially rotatable, a revolving rotary shaft which, having a liquid flow passage connected to the liquid flow passage and being provided in a direction substantially perpendicular to the rotary shaft, is installed so as to be revolvable about the rotary shaft and axially rotatable, and a nozzle provided at a leading end of the revolving rotary shaft, wherein a gas flow passage is provided along the liquid flow passage of each of the rotary shaft and the revolving rotary shaft from a gas inflow opening provided in the rotary shaft, wherein a configuration is such as to eject a gas-liquid mixture flow having a gas supplied from outside the object to be cleaned mixed with the liquid ejected from the nozzle.