| http://www.w3.org/ns/prov#value | - s 7, driven by the piston 10, is aided by bushings 14.As shown in FIGS. 2 and 3, the disclosed ventilating device forms a ventilating unit or assembly which can be coupled for example in pairs to the thermoforming station of FIGS. 2 and 3, to form an integrating part of the latter and providecooling at any intended locations of said thermoforming station.T
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