| 摘要 |
The invention relates especially to the fitting of tubular fans 1 in standardized ducting 5, of rectangular cross section, and is based on the provision of elements 6 which may be coupled to the end of the ducting and which form one or two mouths 9, with an inner elastic gasket 11, in which it is possible to fit the end openings 3 of the casings of the fan or fans 1, which are fastened by means of common supports 13-17-23 with optional interposition of resilient plugs 19. <IMAGE>
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