Fire equipment. Fire filter respirators for the protection of human breath and eyes for use at natural fire extinguishing in open spaces. General technical requirements. Test methods
Petroleum and natural gas in dustries. Subsea production systems. Bar of nickel-chromium-molybdenum-niobiumalloy, nickel-chromium-molybdenum-silicon andnickel-chromium-molybdenum-tungstenalloys. Specifications