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90mm 3-element uni-focal lens
Cylindrical borosilicate 3
Kaolin (clay) powder (5g)
Designed to generate and detect ultrasonic waves above the audible range
PVC Lab Thermometer, -40 to 50°C Prepared Slides_Botany 90mm 3-element uni-focal lensSpirit filled glass thermometer on a white PVC backing, sized for room temperature and refrigerator monitoring in classrooms and field use settings.
US$ 229.50
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