| 摘要 |
The invention relates to an insulation for a gas port (2), preferably of a cylinder head (1), the internal space (6) of the insulation being sealed gas-tight and evacuated, and the surfaces of the walls defining the internal chamber being reflectively coated or mirror-finished. In order to intensify the insulation effect, the inner chamber (6) is filled with ceramic material in powder, fibre or fleece form (Fig. 1). <IMAGE>
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