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demonstrating ddt hand spraying equipment while applying the insecticide

demonstrating ddt hand spraying equipment while applying the insecticide

标签: demonstrating,ddt,hand,sprayin 浏览: 1
demonstrates the use of ddt hand spraying equipment

demonstrates the use of ddt hand spraying equipment

标签: demonstrates,the,use,of,ddt,ha 浏览: 1
men in a village in india spraying the insecticide ddt dichlorodiphenyltrichloroethan

men in a village in india spraying the insecticide ddt dichlorodiphenyltrichloroethan

标签: men,in,a,village,in,india,spra 浏览: 0

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