The present invention is an engine, including two banks of cylinders in a flat, opposed cylinder arrangement and a crankshaft having a plurality of paired throws, the two throws of each respective pair of throws being disposed adjacent to each other and coplanar with respect to each other. The absorbent member is composed of a liquid-pervious topsheet, a backsheet and an absorbent core member disposed therebetween. According to the disclosure, device test leads serve to input different test signals on the rising and falling edge of the testscan clock which reduces the number of interconnects between a tester and the device under test. The core mixture is injected from a second injection unit into the co-injection manifold to create a flow of core mixture therethrough. The output stage circuit generates an output voltage according to a voltage on an output terminal of the operational amplifier, and provides the output voltage to the operational amplifier. The bead shape determination unit 7 is configured to calculate the position of the end of a bead region based on the bead region recognized by the bead recognition unit 6, and to determine whether the shape of the end of the bead region is convex or concave in the extending direction of the bead region.