| 摘要 |
<p>1432006 Spray-producers SCIENTIFIC ENTERPRISES INC 20 June 1973 [27 June 1972] 29276/73 Heading B2F [Also in Divisions F1, H1 and H3] Particles of paint or powder used to coat surfaces are electrically charged by inserting a tube 71 leading from a container 72 for the paint or powder into the nozzle-head 34 of an ion generator (see Division H1) which generates a stream of ions pulsed at ultrasonic frequency by a cavity resonator.</p> |
