A semiconductor laser device capable of improving planarity of cleavage planes of an optical waveguide thereof is obtained. In accordance with the method for fabricating an interlayer conducting structure of an embedded circuitry of the present invention, there is no laser conformal mask formed prior to laminating the first and second lamination plates. The system includes multiple selectively rotatable bogies having terrain-engaging elements that are capable of independent rotation with respect to the vehicle and the bogies. Moreover, when in the folded position, a rear rail of the trailer may be opened to carry articles. The X-ray source includes an actuator coaxially aligned with the X-ray chamber and configured to generate a stress in the sidewall. An edible fat or oil component is dispersed in an aqueous phase with a two-component emulsifier system comprising a primary emulsifier which acts to stabilise the emulsion and a secondary emulsifier which works in synergy with the fat or oil component to impart a desirable texture and structure to the finished product.