Abstract: A method of manufacturing an electrical connector includes: contacting an end portion of a center conductor exposed in an end portion of a coaxial cable having the center conductor with a conductive contact; applying ultrasonic vibration to the end portion of the center conductor and the contact to join the end portion of the center conductor and the contact each other; and accommodating the contact in an insulation housing after the end portion of the center conductor and the contact are joined to each other, and covering at least a part of a joint of the end portion of the center conductor and the contact with the insulation housing.

Abstract: A method of manufacturing an electrical connector includes: contacting an end portion of a center conductor exposed in an end portion of a coaxial cable having the center conductor with a conductive contact; applying ultrasonic vibration to the end portion of the center conductor and the contact to join the end portion of the center conductor and the contact each other; and accommodating the contact in an insulation housing after the end portion of the center conductor and the contact are joined to each other, and covering at least a part of a joint of the end portion of the center conductor and the contact with the insulation housing.

Abstract: A reservoir tank of the present invention employed in a liquid cooling system is provided with a plurality of outlets for feeding out the coolant and a plurality of inlets to which the coolant returns after cooling electronics devices. These outlets are provided at the center of bottom of the tank and these inlets are provided at the external circumference of the outlets. Incident angle of the inlets to the tank is inclined from the vertical line of tank so that the coolant generates a whirlpool around the vertical axis of tank. A cylindrical partition may be provided between the center of the bottom having the inlets and the circumferential part having the outlets, so as to prevent a short path of the coolant flowing from inlets to the outlets. In this case, holes may be provided at the partition so that the coolant stirred at the outside of partition flows to the outlets therethrough.