| 摘要 |
<p>The temp. of the contents of a vessel such as a bottle is rapidly checked by the colour change of the contents of a sachet. The colour is maintained as long as the temp. is maintained. A galss or metal feeding bottle (1) has a transparent plate (2) attached to it. A number of flat transparent sachets (3, 4, 5) are inserted between the plate and bottle. These sachets are sealed and have a thin opaque film attached to their surface in the form of a letter to indicate normal (3) high (5) or low (4) temp.</p> |
