MT 52-1996 Coal mining rock drill

MT 52-1980

MT 52-2009 Coal mining support electric drill

GB/T 1032-2005 Test procedures for three-phase induction motors GB/T 1032-2012 Test procedures for three-phase induction motors GB/T 1032-2023 Test methods for three-phase asynchronous motors GB 3836.1-2000 Electrical apparatus for explosive gas atmospheres—Part 1:General requirements GB 3836.1-2010 Explosive atmospheres—Part 1:Equipment—General requirements GB/T 3836.1-2021 Explosive atmospheres—Part 1:Equipment—General requirements GB 3836.2-2000 Electrical apparatus for explosive gas atmospheres—Part 2:Flameproof enclosure “d” GB 3836.2-2010 Explosive atmospheres—Part 2:Equipment protection by flameproof enclosures "d" GB/T 3836.2-2021 Explosive atmospheres—Part 2:Equipment protection by flameproof enclosures “d” GB 3836.3-2000 Electrical apparatus for explosive gas atmospheres—Part 3:Increased safety “e” GB 3836.3-2010 Explosive atmospheres—Part 3:Equipment protection by increased safety "e" GB/T 3836.3-2021 Explosive atmospheres—Part 3:Equipment protection by increased safety “e” GB/T 5898-1986 Measurement of noise emitted by rock drilling machines and pneumatic tools—Engineering method GB/T 5898-2004 Measurement of noise emitted by rock drilling machines and pneumatic tools—Engineering method GB/T 5898-2008 Hand-held non-electric power tools—Noise measurement code—Engineering method(grade 2) GB/T 10111-1988 Methods for random sampling by utilizing dices of random number GB/T 10111-2008 Generation of random numbers and procedures applied to sampling inspection for product quality GB/T 13813-2001 Testing method and judging rule of safety to friction spark of metallic material for coal mine GB/T 13813-2008 Testing method and judging rule of safety to friction spark of metallic material for coal mine GB/T 13813-2023 Testing method and judging rule of safety to friction spark of metallic material for coal mine