| 摘要 |
The invention relates to a heating duct (1) for hot air or other gaseous, hot media. The heating duct (1) consists of one or more hollow bodies (2, 3) which have an outer layer (4) made of glassfibre-reinforced cement, an insulation layer (5) and an inner layer (6) made of glassfibre-reinforced cement. The hollow bodies (2, 3) are connected at the connection points by inserted sleeves (7, 8) made of metal. The sleeves (7, 8) have stops in the form of outwardly directed webs (9, 11) with fastening eyes (10). <IMAGE>
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