Abstract: A heater duct is disposed between an air blower unit and an air heater unit. A plate is disposed in the heater duct near an outlet joint of the heater duct. The plate has a closure member and a plurality of through holes defined therein on opposite sides of the closure member. Air delivered under pressure from the air blower unit is divided by the closure member into air flows that pass through the through holes and are combined and mixed with each other, supplying air to the air heater unit with a desired air speed distribution. The plate, which is of a relatively simple structure, is capable of easily and reliably achieving the same air speed distribution when an evaporator is not installed as the air speed distribution when the evaporator is installed, providing an effectively increased vehicle heating capability.

Abstract: A multilayer printed circuit board comprising a laminate of at least one glass fiber nonwoven cloth layer impregnated with thermosetting resin and glass fiber woven cloth layers impregnated with thermosetting resin, the laminate having a pair of V-cut grooves formed therein so that only the glass fiber nonwoven cloth layer remains uncut whereby the multilayer printed circuit board can be divided at the uncut glass fiber nonwoven cloth layer along the V-cut grooves into a plurality of printed circuit board portions which can be mounted having a practical size.

Abstract: A system for measuring the length of a running material such as steel cable is proposed which includes a magnetic marker, a mark detector having three magnetic sensors, and a signal handling means. The magnetic mark is accurately detected by use of the zero crossing point detection method for an accurate length measurement. An accurate measurement is further assured by various compensation arrangements.