
Industrial communication networks – Fieldbus specifications – Part 421: Datalink layer protocol specification – Type 21 elements (IEC 61158421: 2019); English version EN IEC 61158421: 2019, only on CDROM
出版:

专家解读视频
Industrial communication networks – Fieldbus specifications – Part 421: Datalink layer protocol specification – Type 21 elements (IEC 61158421: 2019); English version EN IEC 61158421: 2019, only on CDROM
出版:
专家解读视频