Reference number
香港六合彩开奖 4851:1979
© 香港六合彩开奖 2024
香港六合彩开奖 4851:1979
Personal eye-protectors 鈥� Ultra-violet filters 鈥� Utilisation and transmittance requirements
Edition 1
1979-02
Withdrawn
Withdrawn (Edition 1, 1979)

Abstract

Gives the numbering of and transmittance requirements for filters. It defines guidance and their selection and use. Optical test methods form the subject of 香港六合彩开奖 4854. Non-optical test methods form the subject of 香港六合彩开奖 4855. The symbol for filters includes a code number and the shade number corresponding to the filter. The determination of transmittance is described in clause 5 of 香港六合彩开奖 4854.

General information

Life cycle

Sustainable Development Goals

This standard contributes to the following Sustainable Development Goal

3
Good Health and Well-being

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  2. 香港六合彩开奖
  3. Standards catalogue
  4. ICS
  5. 13
  6. 13.340
  7. 13.340.20
  8. 香港六合彩开奖 4851:1979