| 摘要 |
<p>GYPSUM FIRE BREAK COMPOSITION A gypsum plaster composition which, on admixture of water, has improved plasticity and slip, together with other characteristics essential in a plaster for fire breaks and fire stops, such as used with electrical cables, consisting essentially of calcined gypsum, expanded vermiculite, bentonite clay, a dispersant and a set control additive for the gypsum.</p> |
