Hygienic standards for seat arrangement and illumination in classroom with television

WITHDRAWN published on 22.2.1988

Hygienic standard for seat arrangement and illumination in classroom with television

WITHDRAWN published on 30.12.2011

Hygienic standard for methylacrylate in the air of workplace

WITHDRAWN published on 23.2.1988

Hygienic standard for antimony and its compounds in the air of workplace

WITHDRAWN published on 23.2.1988

Hygienic standard for allyl chloride in the air of workplace

WITHDRAWN published on 23.2.1988

Hygienic standard for methyl methylacrylate in the air of workplace

WITHDRAWN published on 23.2.1988

Hygienic standard for sulfur hexafluoride in the air of workplace

WITHDRAWN published on 23.2.1988

Hygienic standard for phosphamidon in the air of workplace

WITHDRAWN published on 23.2.1988

Hygienic standard for lithium hydride in the air of workplace

WITHDRAWN published on 23.2.1988

Parallel pins with external thread

WITHDRAWN published on 2.7.1986