MT/T 573-1996 Testing method for mining hydraulic gear pump

GB/T 786.1-1993 Fluid power systems and components—Graphic symbols and circuit diagrams—Part 1:Graphic symbols GB/T 786.1-2009 Fluid power systems and components—Graphic symbols and circuit diagrams—Part 1:Graphic symbols for conventional use and data-processing applications GB/T 786.1-2021 Fluid power systems and components—Graphical symbols and circuit diagrams—Part 1:Graphical symbols GB/T 3767-1996 Acoustics—Determination of sound power levels of noise sources using sound pressure—Engineering method in an essentially free field over a reflecting plane GB/T 3767-2016 Acoustics—Determination of sound power levels and sound energy levels of noise sources using sound pressure—Engineering methods for an essentially free field over a reflecting plane GB/T 14039-2002 Hydraulic fluid power—Fluids—Method for coding the level of contamination by solid particles MT/T 459-1995 General technical specifications for hydraulic components used in coal mining machinery MT/T 459-2007 Coal mining machine hydraulic fluid power-General rules relating to hydranlic components