A method and system is provided for calculating motion vectors of macroblocks in a digital image of a digital video stream. The metal layer may be deposited by sputtering and thermally processed by rapid thermal processing, for example. If the configurations are different, a new query can be automatically generated. The first pressing plate is configured for assembling a shaft on a first surface of the moveable frame. By the machining solution nozzles, liquid of the machining solution adhering to the workpiece and liquid adhering to the machining solution nozzle which is capable of dripping onto a face to be machined of the workpiece, are removed.