Objective To understand the field rat repelling effect with the ultrasonic rat repellent and provide scientific data for rat prevention in special environments.

目的了解超声波驱鼠器现场驱鼠效果，为特殊环境防鼠提供科学依据。

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Biocides are the name given for pesticides used outside the field of agriculture, such as rat poison or treating furniture with fungicides.

BBC: MEPs warning over rat population increase