Intermittent cockroaches caught off device
 Intermittent cockroach trap off a circuit shown in FIG.  It is mainly the use of a DC high voltage to kill cockroaches.  But
 because cockroaches are more sensitive to electric fields, can not 
climb with a high voltage power grid, so take the form of high-voltage 
circuit intermittently generated. 
 Intermittent cockroach trap off a circuit shown in FIG.  It is mainly the use of a DC high voltage to kill cockroaches.  But
 because cockroaches are more sensitive to electric fields, can not 
climb with a high voltage power grid, so take the form of high-voltage 
circuit intermittently generated.
 
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