T/ZZB 0719-2018
Permanent magnetic ferrite for speaker—Big ring shaped (English Version)
- Standard No.
- T/ZZB 0719-2018
- Language
- Chinese, Available in English version
- Release Date
- 2018
- Published By
- Group Standards of the People's Republic of China
- Latest
- T/ZZB 0719-2018
- Scope
- This standard specifies the terms and definitions, product structure, basic requirements, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage and quality commitment of permanent ferrite for loudspeakers - large-size ring magnets. This standard is applicable to the preparation of sintered permanent magnet ferrite for speakers using powder metallurgy technology - large-sized ring magnets (referring to magnets with an outer diameter of ≥220 mm or a height of ≥30 mm, hereafter referred to as: large-sized ring magnets).
T/ZZB 0719-2018 history
- 2018 T/ZZB 0719-2018 Permanent magnetic ferrite for speaker—Big ring shaped
