| 摘要 |
<p>A method of making a gas delivery device in which a delivery conduit and a core are located in a vibratory mold, and refractory granular material with a binder are poured into the mold. The core is removed, and a porous element is inserted in the resulting recess. The assembly is then heat treated to form the completed device. The device is especially useful for degasifying aluminium, copper, and their alloys.</p> |
