| 摘要 |
An apparatus adapted to provide in an atmosphere one of at least three volatile liquids, the apparatus comprising a source of air current, radially extending from the source of air current a plurality of coplanar air channels, corresponding to the number of volatile liquids, placed such that the air current flows through them, each channel leading to a different volatile liquid-emitting member and then into the atmosphere; and located in each channel between the source and the volatile liquid-emitting member, means of blocking the channel and preventing the flow of air therethrough. The apparatus allows an easy change from one liquid to another and control over the time of the emission of each liquid. |
