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أجزاء دقيقة دوارة طحن الألومنيوم للمتقدمين

created date: 2252014 3:27:34 researchers looked at more than 600 crop pests from around the world. these included fungi, such as wheat rust, which is devastating harvests in africa and the middle east; insects like the mountain pine beetle thats destroying trees in the us; as well as bacteria, viruses and microscopic nematode worms.

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