| 摘要 |
<p>An azeotrope-like composition consisting essentially of 49-55 weight percent difluoromethane, 40-49.5 weight percent pentafluoroethane and 0.5-5 carbon dioxide, wherein when up to 50 weight percent of an initial composition is evaporated, the vapor pressure of the composition changes by less than about 10 percent.</p> |
