I work for N Y C dept. of health and one of our angencys is pest control and up to the early 80,s we still used those machines i used to repair them. They were called tifa's they used aprox. 98%deisel oil and 2% Malithine which is why they don,t use them any more. They used to use it on helicopters and sprayed a pregnant woman and the city got sued And that was why the city stoped using it
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