Abstract: A wireless headphone system, a wireless headphone, and a base. The wireless headphone system includes the wireless headphone and the base. The base includes a base RXD wire, a base TXD wire, a base connection wire, and a base triode; and the wireless headphone includes a wireless headphone RXD wire, a wireless headphone TXD wire, a wireless headphone connection wire, and a wireless headphone transistor. The base RXD wire and the base TXD wire are connected together through the base transistor and led out through the base connection wire. The wireless headphone RXD wire and the wireless headphone TXD wire are connected together through the wireless headphone transistor and led out through the wireless headphone connection wire. When the headphone is charged on the base, two-way communication between the headphone and the base can still be implemented while maintaining the existing three-wire design.

Abstract: A wireless headphone system, a wireless headphone, and a base. The wireless headphone system includes the wireless headphone and the base. The base includes a base RXD wire, a base TXD wire, a base connection wire, and a base triode; and the wireless headphone includes a wireless headphone RXD wire, a wireless headphone TXD wire, a wireless headphone connection wire, and a wireless headphone transistor. The base RXD wire and the base TXD wire are connected together through the base transistor and led out through the base connection wire. The wireless headphone RXD wire and the wireless headphone TXD wire are connected together through the wireless headphone transistor and led out through the wireless headphone connection wire. When the headphone is charged on the base, two-way communication between the headphone and the base can still be implemented while maintaining the existing three-wire design.

Abstract: A body-wall-contact-type water tank (12) is equipped with: a water-tank body for storing a fluid to be supplied into a body cavity, and positioned so as to contact a body wall (120); a through-hole which conveys the fluid stored in the water-tank body into the body cavity via an incision formed in the body wall (120), and which is formed in the bottom section of the water-tank body; and a connecting means for connecting, in a fluid-tight manner, the water-tank body to the body wall (120) and/or to a retractor (110) attached to the incision.

Abstract: The method includes a process of (i) and a process of (ii) in this order. In the process of (i), the potential of a first anode and the potential of a first cathode are adjusted in an aqueous solution containing chloride ions so as to increase the concentration of free chlorine in the aqueous solution. In the process of (ii), the potential of a second anode and the potential of a second cathode are adjusted in the aqueous solution so as to decrease the concentration of free chlorine in the aqueous solution. The difference between the potential of the second anode and the potential of the second cathode in the process of (ii) is smaller than the difference between the potential of the first anode and the potential of the first cathode in the process of (i).

Abstract: The method includes a process of (i) and a process of (ii) in this order. In the process of (i), the potential of a first anode and the potential of a first cathode are adjusted in an aqueous solution containing chloride ions so as to increase the concentration of free chlorine in the aqueous solution. In the process of (ii), the potential of a second anode and the potential of a second cathode are adjusted in the aqueous solution so as to decrease the concentration of free chlorine in the aqueous solution. The difference between the potential of the second anode and the potential of the second cathode in the process of (ii) is smaller than the difference between the potential of the first anode and the potential of the first cathode in the process of (i).

Abstract: A body-wall-contact-type water tank (12) is equipped with: a water-tank body for storing a fluid to be supplied into a body cavity, and positioned so as to contact a body wall (120); a through-hole which conveys the fluid stored in the water-tank body into the body cavity via an incision formed in the body wall (120), and which is formed in the bottom section of the water-tank body; and a connecting means for connecting, in a fluid-tight manner, the water-tank body to the body wall (120) and/or to a retractor (110) attached to the incision.