| 摘要 |
<p num="1"><br/><br/><br/>A pipe (12) for feeding a gas into an oven, a furnaces, or the like (such as a <br/>CVI /CVD oven), and in particular into a reaction chamber structure (16) <br/>inside the oven, is provided with a gastight tubular sealing device (32) <br/>extending radially outside the pipe and defining a path that is practically <br/>gastight, along which there extends the as feed pipe. The tubular sealing <br/>device is preferably at least partially flexible in the transverse direction <br/>and/or the axial direction so as to accommodate positioning defects between a <br/>location situated in the reaction chamber and a location where the gas feed <br/>pipe penetrates into the oven (which defects may be due, for example, to <br/>asymmetrical thermal expansion/contraction).<br/>
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