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electricity (90) 90
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general tagging of cross-sectional technologies spanning over several sections of the ipc (60) 60
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conveying (19) 19
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handling thin or filamentary material (19) 19
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electric communication technique (18) 18
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handling thin or filamentary material, e.g. sheets, webs,cables (17) 17
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positive displacement machines for liquids (17) 17
pumps for liquids or elastic fluids (17) 17
electric techniques not otherwise provided for (16) 16
fixed constructions (16) 16
casings or constructional details of electric apparatus (14) 14
manufacture of assemblages of electrical components (14) 14
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light sources using charges of combustible material (9) 9
light sources using electrochemiluminescence (9) 9
light sources using semiconductor devices as light-generatingelements (9) 9
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physics, applied (9) 9
pictorial communication, e.g. television (9) 9
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air-conditioning, air-humidification, ventilation, use of aircurrents for screening (8) 8
analysis (8) 8
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dredging (8) 8
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general measures for producing and maintaining effectivefunctioning of machines or installations (8) 8
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non-positive displacement pumps (8) 8
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