Abstract: A heat exchanger includes a plurality of flat tubes. The flat tubes have a pair of tube sheets facing each other and joined together. The tube sheets have a flat part, a recess part, and a cylindrical tank. The tube sheet is one of a first tube sheet and a second tube sheet. The first tube sheet has a first type of tank. The second tube sheet has the first type of tank and a second type of tank. Identifiers are provided at each end of the second tube sheet. The identifiers distinguishing the second tube sheet from the first tube sheet when viewed from externally of the stacked flat tubes. A mark provided at one of the identifiers of the second tube sheet.

Abstract: A heat exchanger includes a plurality of flat tubes. The flat tubes have a pair of tube sheets facing each other and joined together. The tube sheets have a flat part, a recess part, and a cylindrical tank. The tube sheet is one of a first tube sheet and a second tube sheet. The first tube sheet has a first type of tank. The second tube sheet has the first type of tank and a second type of tank. Identifiers are provided at each end of the second tube sheet. The identifiers distinguishing the second tube sheet from the first tube sheet when viewed from externally of the stacked flat tubes. A mark provided at one of the identifiers of the second tube sheet.

Abstract: An integrated circuit device in which a CPU not to be used of a plurality of CPUs formed on one chip can easily be disconnected by an external signal in order to reduce the costs of developing an LSI. In accordance with a CPU selection signal inputted from the outside, a decoder generates an internal selection signal for selecting a CPU to be operated and sends the internal selection signal to the plurality of CPUs. Only the selected CPU can perform valid access to a bus to use peripheral modules.

Abstract: An evaporator for an automotive air conditioner includes first to fourth tank passages connected to a core to flow refrigerant in the order of the first tank passage, the core, the second tank passage, the third tank passage, the core and the fourth tank passage. A choke portion is installed in the fourth tank passage to restrict the flow rate at a part of refrigerant passages of the core. This evaporator is improved in cooling capacity and in capacity for reducing noises.