UNE-EN ISO 22568-4:2021现行
Foot and leg protectors - Requirements and test methods for footwear components - Part 4: Non-metallic perforation resistant inserts (ISO 22568-4:2021) (Endorsed by Asociacin Espaola de Normalizacin in February of 2022.)
出版：Asociacion Espanola de Normalizacion
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