Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for selectively providing images. The pixel structure includes a scan line, a gate, a first dielectric layer, a channel layer, a source, a drain, a data line, a second dielectric layer, and a pixel electrode. The player can decide to pay the cost and get the respin or decline. , so as to prevent the anvil from mechanically or diffusion bonding to the work pieces and so as to minimize, or eliminate altogether, anvil deformation. A flow rate adjustment mechanism includes a throttle member threadably mounted on the shaft for movement relative to the shaft, toward or away from an annular seat having a discontinuous edge such that the flow rate cannot be shut off by having the throttle member engage the seat. When the image from the first image sensor is recorded, focus detection is performed by use of an image signal from the second image sensor, to thus effect automatic focusing.