Petroleum and natural gas industries. Materials for use in H2S-containing environments in oil and gas production. Part 2. Cracking-resistant carbon and low-alloy steels and the use of cast irons
Occupational safety standards system. Respiratory protective devices. Self contained escape apparatus with chemical oxygen. General technical requirements. Test methods
Electrical apparatus for explosive gas atmospheres. Part 1-1. Flameproof enclosures 'd'. Method of testing for ascertainment of maximum experimental safe gap
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