步进电机驱动的无级变速器式变量施肥控制装备的设计
Publisher: 国家哲学社会科学学术期刊数据库
E-ISSN: 1673-1808|32|3|90-93
ISSN: 1673-1808
Source: 晋中学院学报, Vol.32, Iss.3, 2015-01, pp. : 90-93
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Abstract