Hobby Accessories-Namely, Parts for Model Airplane Engines and Model Boats

Scientific, weighing, measuring and checking (supervision) apparatus and instruments for measuring thermal properties such as the resistance to electrical conductivity at a given temperature; flow meters; sensing and monitoring apparatus and instruments and apparatus and instruments for measuring electrical properties, namely, for sensing the flow of liquids and monitoring for quality control the flow of liquids and for measuring the resistance to electrical conductivity at a given temperatur...