ข้อมูลTube and panel arrangements for ceiling, wall, or underfloor heating (electric underfloor heating F24D0013020000; special adaptations of floors for incorporating ducts, e.g. for heating or ventilating, E04B0005480000; building elements of block or other shape for the construction of parts of buildings characterised by special adaptations, e.g. serving for locating conduits, E04C0001390000; building elements of relatively thin form for the construction of parts of buildings with special adaptations for auxiliary purposes, e.g. serving for locating conduits, E04C0002520000)

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