A switch is used to detect openingclosing of a car door or the like in a vehicle, and the switch can be provided with a nice operation feeling and stable performance. Each of the second to M-th block images is comprised of continuous \u201cn\u201d lines of the original image, and overlapped portions for \u201cd\u201d lines are present between the first to -th block images and the second to M-th block images, respectively. At least a first one of the plurality of fault detection chains includes a contact pad, a first metal feature coupled to the contact pad by a first via in a passivation layer, a second metal feature coupled to the first metal feature by a second via, and a substrate contact coupled to the second metal feature by a third via. The tube has a proximal open end and a distal open end and is attached longitudinally to the outside surface of the hollow barrel. The color combination mechanism utilizes a color-combining prism assembly in which two triangular prisms are assembled with each other. The railroad flangeway cleaner system includes a frame for traveling along a channel, a drive unit attached to the frame and a cleaning device rotated by the drive unit, wherein the cleaning device clears the channel of debris.