| 摘要 |
Apparatus for spraying agent 4 comprises a bulk storage tank (3) for the agent, a separate bulk storage vessel for propellant, means to transfer a unit treatment charge of agent into a pressure vessel (20) and timer controlled injector (34, 17) means to expel that charge from the pressure vessel (20), mix it with propellant and deliver the mixture to a plurality of spray nozzles (30). <IMAGE> |
