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+classificationCode:(bk\:48.* OR ddc\:635*) databaseDate:[NOW/DAY-11month TO NOW/DAY]
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+classificationCode:(bk\:48.* OR ddc\:635*) databaseDate:[NOW/DAY-month TO NOW/DAY]
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+classificationCode:(bk\:48.* OR ddc\:635*) databaseDate:[NOW/DAY-12month TO NOW/DAY]
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+classificationCode:(bk\:48.* OR ddc\:635*) databaseDate:[NOW/DAY-18month TO NOW/DAY]
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+classificationCode:(bk\:48.* OR ddc\:635*) databaseDate:[NOW/DAY-6month TO NOW/DAY]
Emissions- und Betriebsverhalten eines Biomethantraktors mit Zündstrahlmotor