Under 621.1 is classed information about the generation and technical applications of steam, and also about heat engines in general, matters common to 621.1, 621.4 and 621.5 being classed under 621.1. Under 621.22 is classed information about the technical applications of hydraulic energy and water power.
BS 1000[621.1/.22]-1984由英国标准学会 GB-BSI 发布于 1984-11-30,并于 1984-11-30 实施。
BS 1000[621.1/.22]-1984 在中国标准分类中归属于: A14 图书馆、档案、文献与情报工作,在国际标准分类中归属于: 01.140.20 信息学。
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