The mark consists of the three-dimensional configuration of a control panel with a vertical panel and a horizontal panel. The configuration of the vertical panel includes two rectangular three-switch panels; three circular structures; a four-sided polygonal panel; a square panel; and a hexagonal hand valve. The configuration of the horizontal panel includes eight levers. The three-switch panels appear in the upper left corner of the vertical panel. Below the three-switch panels is the hexagonal hand valve with concentric circles in the center. The three circular structures are to the right of the two three-switch panels. Below the three circular structures is the four-sided polygonal panel with two rows of six circular indicator lights. The square panel is to the right of the vertical control panel. The square panel has five elements. Beginning in the upper left of the square panel and proceeding clockwise is a rectangular structure; a circular structure; a rectangular switch; a circular switch; and six vertical circular indicator lights. The horizontal panel comprises eight levers each within a vertical track. The heads of the levers are claimed as a part of the mark. The dotted lines representing the shafts of the levers are not claimed as a part of the mark. The white background is not claimed as a feature of the mark. The matter shown in broken lines depicting the elements of the control panel show the placement of the mark and are not claimed as part of the mark.