GB/T 13511.4-2025

Assembled spectacles—Part 4: Multifocal and power-variation near-vision spectacles

STANDARD published on 28.2.2025

English, Chinese -
electronic design (pdf) (334.80 USD)

The information about the standard:

Designation standards: GB/T 13511.4-2025
Publication date standards: 28.2.2025
Country: Chinese technical standard
Category: Technical standards GB