Workplace atmospheres - Short term detector tube measurement systems - Requirements and test methods (ISO 17621:2015); German version EN ISO 17621:2015— 37 стр.
Explosive atmospheres - Part 37: Non-electrical equipment for explosive atmospheres - Non-electrical type of protection constructional safety ''c'', control of ignition sources ''b'', liquid immersion ''k'' (ISO 80079-37:2016)