| 摘要 |
<p>The present invention provides devices and methods for the impregnation of air with the vapour or aerosol of a substance in a‘controllable manner to enable the testing or training of detection means to evaluate and quantify the presence of the substance in an enclosed volume, and iη•particular to enable production of training aids and quality assurance test items for use in canine-olfaction based security screening.</p> |
