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An optical table comprising an upper skin tapped with holes for mounting equipment, a lower skin with a plurality of through holes which is coaxial with the tapped holes on the upper skin in a one to one arrangement, a honeycomb core, a connecting side wall, and a number of tubes. The tubes are posi

An optical table comprising an upper skin tapped with holes for mounting equipment, a lower skin with a plurality of through holes which is coaxial with the tapped holes on the upper skin in a one to one arrangement, a honeycomb core, a connecting side wall, and a number of tubes. The tubes are positioned between the interior of the upper and lower skins so as to connect the holes on both skins so that contaminants and residue will be unable to enter into the interior of the honeycomb core, and so that the optical table can be rapidly and thoroughly cleaned.

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What is claimed is: 1. An optical table comprising a tabletop comprising an upper skin tapped with a plurality of holes for mounting equipment and a lower skin having a plurality of through holes; a honeycomb core; a side wall connecting said upper and lower skins; a plurality of tubes disposed bet

What is claimed is: 1. An optical table comprising a tabletop comprising an upper skin tapped with a plurality of holes for mounting equipment and a lower skin having a plurality of through holes; a honeycomb core; a side wall connecting said upper and lower skins; a plurality of tubes disposed between said upper and said lower skins, said tubes connecting said tapped holes and said through holes; and a plurality of big cups and a supporting vibration-isolating system having a plurality of legs, wherein said big cups are inserted into said legs. 2. The optical table of claim 1 wherein the internal surfaces of said big cups have a cladding material to prevent corrosion. 3. The optical table of claim 1 wherein said big cups are placed on or bolted onto the support legs and reinforced on said lower skin with bolts, and match with the dimension of the support legs. 4. The optical table of claim 1 comprising a plurality of passages within said honeycomb core, said passages comprising said tubes, said tapped holes and said through holes. 5. The optical table of claim 1 wherein the diameter of said through holes is equal or not equal to the diameter of said tapped holes. 6. The optical table of claim 1 wherein said tubes are made of metal or high polymer synthetic material having anti-corrosive properties. 7. The optical table of claim 1 wherein said tubes are glued onto the interior of both skins or onto the interior of said upper skin and said through holes. 8. An optical table comprising a tabletop comprising an upper skin tapped with a plurality of holes for mounting equipment and a lower skin having a plurality of through holes; a honeycomb core; a side wall connecting said upper and lower skins; a plurality of tubes disposed between said upper and said lower skins, said tubes connecting said tapped holes and said through holes, wherein the shape of said tubes is columnar; the inner diameter of one tube end which is near said upper skin is not smaller than the diameter of said tapped holes, and the outer diameter of another tube end which is near the said lower skin is not smaller than the diameter of said through holes; and when the outer diameter of said tube end which is near the said lower skin equals the diameter of said through holes, said tubes extend into said through holes. 9. An optical table comprising a tabletop comprising an upper skin tapped with a plurality of holes for mounting equipment and a lower skin having a plurality of through holes; a honeycomb core; a side wall connecting said upper and lower skins; a plurality of tubes disposed between said upper and said lower skins, said tubes connecting said tapped holes and said through holes, wherein the inner diameter of one tube end which is near said upper skin is not smaller than the diameter of said tapped holes, and the outer diameter of another tube end which is near the said lower skin is not smaller than the diameter of said through holes; and when the outer diameter of said tube end which is near the said lower skin equals the diameter of said through holes, said tubes extend into said through holes.