《盲杖第1部分:安全色标志》国家标准色度性能和光度性能指标的确定

Publisher: 国家哲学社会科学学术期刊数据库

E-ISSN: 1674-5698|volume|2|76-79

ISSN: 1674-5698

Source: 标准科学, Vol.volume, Iss.2, 2017-01, pp. : 76-79

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Abstract