| 摘要 |
<p>In the form of a three dimensional network with such a structure that a large number of openings are interconnected. The porous articles have a good capillary action, and are useful in applications such as wicks for oil lamps or perfume dispensers. The chromic articles are especially useful in corrosive atmospheres. When high mechanical strength is required, a ceramic coating may be deposited on metals.</p> |
