0051 fig1 a b shows a section through the lower side of a machine tool table 2 with duct profile 1 arranged thereon above the assembly surface of the plant or machine the machine tool table 2 has in this case a leg 2 2 reaching into the duct profile 1 the sealing area 3 of the machine tool table 2 being arranged in an outwardly pointing u shaped or nose like opening 4 of the leg 2 2 in the diagram of fig1 a the duct profile 1 is designed in the diagram of fig1 a with a u shaped or nose like upper edge 1 1 which is open at the bottom and the open side 1 2 of which carries a seal 5 in the diagram of fig1 a the duct profile 1 is already in a lowered state in the detail shown in fig1 b the duct profile is in a raised state it can be seen more clearly in this diagram fig1 b that the sealing profile 5 additionally carries a sealing nose 5 1 directed toward the sealing area 3 which can also be designed as a sealing lip an assembly aid 6 is arranged below 1 4 of the duct profile 1 the assembly aid can be formed by rollers and rails on the lower side of the duct profile or by one or more eccentrics the duct profile 1 for example is either raised or lowered by the assembly aid 6 or else inserted in the machine tool table during assembly the diagram of fig1 a shows a solution for connection between connecting side 7 of the machine tool table 2 and extensions 8 or the machine tool table 2.