Alat dan mesin pengukur dan uji coba) Indikator-indikator temperatur, termometer, higrometer, pengukur titik embun, barometer,higrometer, anemometer, anemoskop, pengukur hujan, refraktometer, pengukur pH, pengukllr densitas garam, pengukur densitas gula((Measuring ortesting machines and instruments) Temperature indicators, thermometers, hygrometers, dew point meter, barometer, hygrometers, anemometers, anemoscope, rain gauge, refractometer, pH meter, salt density meter, sugar density meter)