
Hand- and machine-operated circular screwing dies for parallel pipe threads - G series (ISO/FDIS 4231:2016); German and English version FprEN ISO 4231:2016
出版:German Institute for Standardisation (Deutsches Institut für Normung)

专家解读视频
Hand- and machine-operated circular screwing dies for parallel pipe threads - G series (ISO/FDIS 4231:2016); German and English version FprEN ISO 4231:2016
出版:German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频