GB/T 12761-1991 Raise-boring machines

GB/T 12761-2010 Raise-boring machines

GB/T 9065.1-2015 Hydraulic hose fittings—Part 1:Hose fittings with O-ring face seal ends GB/T 9065.2-2010 Connections for hydraulic fluid power and general use—Hose fittings—Part 2:Hose fittings with 24°cone connector ends GB/T 9065.3-2020 Connections for hydraulic fluid power—Hose fittings—Part 3:Flange ends GB/T 9253.1-1999 Threads on rotary shouldered connections for petroleum industry GB/T 9253.2-1999 Petroleum and natural gas industries—Threading,gauging,and thread inspection of casing,tubing and line pipe threads GB/T 9253.2-2017 Petroleum and natural gas industries—Threading,gauging and thread inspection of casing,tubing,and line pipe threads GB 9253.1~9253.7 GB 9253.1~9253.7 GB 9253.1~9253.7 GB 9253.1~9253.7 GB 9253.1~9253.7 JB 1604 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 3836.4-2000 Electrical apparatus for explosive gas atmospheres—Part 4:Intrinsic safety“i” GB 3836.4-2010 Explosive atmospheres—Part 4:Equipment protection by intrinsic safety "i" GB/T 3836.4-2021 Explosive atmospheres—art 4:Equipment protection by intrinsic safety “i” GB/T 4749-2003 Petroleum equipment—Thread gages for rotary shouldered connections GB/T 7935-2005 Hydraulic fluid power—General requirements for hydraulic components GB/T 9065.2-2025 Connections for hydraulic fluid power—Hose fittings—Part 2:24° cone connectors