Phototransistor in metal can clipart about 2 years 4 Strain Gauge clipart over 2 years 2 Analog to Digital clipart over 2 years 8 Thermometer clipart almost 3 years 15 Background clipart almost 3 years 9 Remote clipart almost 3 years 2 Thermometer clipart almost 3 years 4 Cd drive clipart almost 3 years 14 Citizen monitoring - common guy with bgeigie detector clipart about 4 years 5