#$%^&*AU2015100417A420150507.pdf#####Design method for middle barrel for device to kill mosquitoes and/or flies Abstract The invention relates to a design method for the middle barrel suitbale for the deivece to kill mosquitoes and/or flies. The method comprises providing an external barrel and an internal barrel； driving the internal barrel and the external barrel moving with respect to the 5 connecting rod by an actuator arranged to the upper barrel； respectively connecting the internal barrel and the external barrel to the actuator with the first drawstring and the second drawstring, providing an opening for avoiding the first drawstring the second upper cover of the external barrel. Indecer moves to the rod and 10 mosquitoes and/or flies are pressed under water to be drown due to the up-and-down motion of the middle barrel, the killing course do not cause secondary pollution or threat to health.86 -WI2 21 71 71 75, 71 2 23 71 75' 71 7 2 25 76 Fig.11
