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investigating or analysing materials by determining theirchemical or physical properties (1747) 1747
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general tagging of cross-sectional technologies spanning over several sections of the ipc (633) 633
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technical subjects covered by former uspc cross-reference art collections [xracs] and digests (633) 633
technologies or applications for mitigation or adaptation againstclimate change (625) 625
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vehicles in general (574) 574
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