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FR2651568A1
(fr )
1991-03-08
Echangeur a ailettes perfectionne.
FR2505461A1
(fr )
1982-11-12
Recuperateur de chaleur pour chaudiere de chauffage a eau chaude
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CH265780A
(fr )
1949-12-31
Chaudière à tubes.
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BE380610A
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FR2462684A1
(fr )
1981-02-13
Echangeur de chaleur a paroi developpable et a deux fluides circulant a contre-courant
CH635914A5
(en )
1983-04-29
Installation for distributing the heat from a chimney stack
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1957-10-31
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