The present invention discloses an electric arc isolation structure for isolating an electric arc produced by an arc discharge at a transformer, and the transformer includes a primary side input electrode terminal and a secondary side high-voltage output terminal. The aim of the invention is to produce a cell sap concentrate by using liquefied carbon dioxide for the irradiation thereof. The filter calculating an amount of time the data values in the buffer are above an approximate filter value and adjusts the approximate filter value based upon the relationship of the amount of time to the rank order. By the concentric annular structures of the gate electrode layer, resistance to stress and an on-state current of the vertical thin film transistor can be increased. The laser transmitter includes a leveling mechanism that is capable of directing a collimated beam through a select one of the two exit windows, in a generally horizontal direction at a specified grade irrespective of whether the laser transmitter is oriented generally horizontally or generally vertically.