Chemical sprayer
A chemical sprayer was a type of device used to apply chemicals in the form of a mist, such as weed spray. 

During a rescue mission on Phylos in 2269, the landing party consisting of James T. Kirk, Hikaru Sulu, and Leonard McCoy, came armed with chemical sprayers containing McCoy's home-brewed version of his great-great granddaddy's weed spray, which they used to neutralize attacking swoopers and aid in their rescue of Spock. ()

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Technology