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clockmakers --- watches --- scientific instruments --- Applied arts. Arts and crafts --- Hager (familie) --- anno 1500-1799 --- Kunstnijverheid --- Instrumenten. Uurwerken --- horloge --- Astronomical instruments --- Clocks and watches --- Timepieces --- Watches --- Astronomy --- Instruments, Astronomical --- History --- Instruments --- Hager family. --- timepieces --- clocks --- plates [timepiece components] --- kledingaccessoires (ok) --- Chronology --- Horology --- House furnishings --- Clock and watch making --- Time measurements --- Optical instruments --- Physical instruments --- Scientific apparatus and instruments --- Space optics

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Science --- Arab States --- Technology --- Astronomy, Arab --- Medicine, Arab --- Sciences --- Technologie --- Astronomie arabe --- Médecine arabe --- History --- Exhibitions. --- Histoire --- Expositions --- 509.1767 --- Sciences History Islamic countries --- Exhibitions --- Médecine arabe --- Arab countries --- Islam and science --- 78.04.3 Paris --- 78.33.1 --- 506 --- 508 --- 700.4 --- Arab states --- Science, Ancient --- Scientific apparatus and instruments --- Apparatus, Scientific --- Instruments, Scientific --- Scientific instruments --- Research --- Natural science --- Natural sciences --- Science of science --- Ancient science --- Science, Primitive --- Instruments --- Equipment and supplies --- Sciences arabes --- Islam et sciences --- Art arabe --- Science, Medieval

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621.38 --- 621.39 --- Electronic apparatus and appliances --- Electronic circuits --- Electronics --- #TELE:ELEN --- 621.38 )* ELEKTRONICA --- circuits --- elektronica --- Elektrische circuits --- Elektronica --- diode --- gelijkstroom --- operationele versterker --- parallelkring --- serieparallelschakeling --- serieschakeling --- transformator --- transistor --- versterker --- wet van ohm --- wisselstroom --- Electrical engineering --- Physical sciences --- Electron-tube circuits --- Electric circuits --- Electron tubes --- Electronic devices --- Physical instruments --- Scientific apparatus and instruments --- Electronic instruments --- Electronic devices. Electron tubes. Photocells. Particle accelerators. X-ray tubes --- Telecommunication. Telecontrol --- opamp --- Apparatus and appliances --- Contains audio-visual material --- 621.39 Telecommunication. Telecontrol --- 621.38 Electronic devices. Electron tubes. Photocells. Particle accelerators. X-ray tubes