Abstract: In a display and input device (CP) displaying information on a display (DP) and performing changing of the information and communication through switch operating means (CSW1), the switch operating means (CSW1) are arranged on the left and right edges of the display (DP), opaque members among members forming the switch operating means (CSW1) are arranged outside the screen of the display (DP), and only transparent members are arranged on the display (DP). Thus, a switch operation can be performed while recognizing functions of the switch operating means (CSW1) and the switch operating means (CSW1) having the stroke feeling and click feeling of a mechanical switch so that an operating environment having excellent operability and implementing reliable input can be obtained.

Abstract: A composite electrode for resistance welding of the present invention comprises an electrode made of a high-melting point metal or alloy, an electrode holder made of a copper alloy and an intermediate member made of a copper alloy, the electrode being undetachably inserted into the intermediate member which is detachably mounted in the electrode holder so that the contact surface between the end surface of the electrode and the electrode holder bears welding loads when pressure is applied to the electrode, whereby the electrode can be easily mounted or separated and centering of the electrode can be precisely performed.