| 摘要 |
<p>The unit to collect gases in molten metal has a mounting (1) for a carrier tube, to be immersed into the molten metal together with gas connections (3,3') from a central gas channel (4) to pass a carrier gas into the metal. At least a part of the gas collection body (2) has a gas impermeable layer composed of a lower metal part-layer (11), with a higher melting point than the molten metal, and an outer ceramic part-layer (12).</p> |
