| 摘要 |
An apparatus for transferring mass and/or heat comprising a casing, at least two tube sheets and a plurality of tubes. The tubes are connected with the tube sheets and the tube sheets are formed such that they are arranged partly in openings provided in the casing and partly outside the casing, overlapping the casing openings. A seal is disposed between sheets and casing inside and outside the casing openings and the tube sheet has been fabricated by casting onto the casing.
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