| 摘要 |
So that tubes (4, 5) of varying diameter and of varying end design can be received, without the spacing of the tube plates (13, 14) differing appreciably in and opposite to the direction of the arrow (6), with the tube length being the same, the centring device of the tube plate (13, 14) is formed from a double-conical groove (15, 16) having a plane groove bottom (17, 18). <IMAGE>
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