| 摘要 |
The mounting plates have, on their upper side, projections which are arranged in a grid pattern at identical, mutual spacings and are in the form of cylinders (16) with a smooth surface. The edges of the mounting plates run along the central line of cylinders (16) arranged in rows. The mounting plates can therefore be connected to one another by clamping rings (18) laid around the divided cylinders (16). The heating tubes can be installed between neighbouring rows of cylinders (16). <IMAGE>
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