Abstract: An improvement applicable to a plate type heat exchanger for the purpose to make the fabrication thereof easier and to improve the strength and airtightness thereof.

Abstract: An automatic numerical control programming device having a box-like body with a carrying handle and a lid element hinged to the body. The device contains, within the body, a graphic display unit, a floppy deck, an electric processing unit, and controllers. The device also contains, in the inside face of the lid element, a keyboard panel. A carrying handle is attached to either the containing body or the lid element to make the device portable.

Abstract: Disclosed is a portable tape reader characterized in that a lid provided with a handle is integrally formed on the upper portion of a body provided with a reading head, the body is contained in a container box so that the body can be drawn out upwardly, and when the body is drawn out, the container box is held in the lower portion of the body and an opening of the container box is located below the reading head. In the portable tape reader having the above-mentioned structure, a tape which has been read is securely received and stored in the container box.