Laboratory table unit with pull-out boards

Claim 1

IN A LABORATORY TABLE UNIT WITH PULL-OUT BOARDS: (A) AN UNDER-FRAME OF CRUCIFORM OUTLINE HAVING AN UNOBSTRUCTED LOWER SURFACE ADAPTED TO BE POSITIONED ON TOPS OF CABINETS OF VARIOUS SHAPES, THUS PERMITTING DIFFERENT ARRANGEMENTS OF CABINETS TO BE OBTAINED, THE UNDER-FRAME DEFINING TRANSVERSE CROSS-ARM PORTIONS PROJECTING FROM OPPOSITE SIDES OF A MAIN LONGITUDINAL STEM OF THE CROSS PROVIDED BY THE UNDER-FRAME; (B) A TABLE TOP OF CRUCIFORM OUTLINE MOUNTED ON AN UPPER SURFACE OF THE UNDER-FRAME TO PROVIDE A COVERING THE THEREOVER, THE TABLE TOP DEFINING TRANSVERSE CROSSARM PORTIONS PROJECTING FROM OPPOSITE SIDES OF A MAIN LONGITUDINAL STEM OF THE CROSS DEFINED BY THE TABLE TOP; (C) THE CROSS-ARM PORTIONS AND THE MAIN STEM OF THE TABLE TOP OVERLYING THE CROSS-ARM PORTIONS AND THE MAIN STEM OF THE UNDER-FRAME, RESPECTIVELY; (D) A PAIR OF PULL-OUT BOARDS SLIDABLY CARRIED BY THE UNDER-FRAME AND BEING ARRANGED TO BE EXTENDED FROM OPPOSITE SIDES FO THE UNDER-FRAME AND THE LATTER PROVIDING AMPLE SUPPORT FOR THE EXTENDED PULL-OUT BOARDS; (E) AND THESE PULL-OUT BOARDS BEING DISPOSED AT DIFFERENT ELEVATIONS SO THAT THEIR INNER ENDS WILL PASS ONE ANOTHER WHEN THEY ARE PUSHED INWARDLY RELATIVE TO THE UNDER-FRAME.