Diamond core bit for coal drilling
Flat-plate water-resistant gate type MP
General technical condition for turnplate type drill
Polycrystalline diamond compact non-core bit
Polycrystalline diamond compact core bit
Floating seals for coal mine machinery
Reinforced filler for rubber and plastic made of ash and slag from fluidized bed Boiler Specification limits
Mechanical and electrical equipment temperature transducer for coal mine specification for ON/OFF output
Mechanical and electrical equipment temperature transducer for coal mine specification for analogue output
General technical condition for high-resolution automatic earth resistivity instrument
Accelerating agent of shotcrete used in coal mines
Drawing hoist
Technical norms for prediction of mine water quantity with numerical methods
Boom-type roadheaders-Airborne spraying pump station-Technical condition
Specification for routine inspection of coal mining machine-hydraulic system assembly
Specification for routine inspection of coal mining machine-hydraulic system assembly
Technical condition of dragging mode cable protected panel for coal winning machine
General technical condition of mobile membrane separation nitrogen producting device for coal mine
Norms for classification of hydrogeological condition of coal mine
Measuring methods for the primary performances of coal mine supervision systems
Monitoring device for operating system in coal mine mouth
General technical condition of frequency division ON/OFF signal transmission unit for coal mine
Emulsifying oil concentrate and high-water content hydraulic fluid used for powered support and prop
General technical conditions of automatic water-spouting fire extinguishing system for coal mine belt conveyer
General technical conditions of the tube bundle monitoring systen for coalmine spontaneous combustion
Test method of flame resistance property of polystyrene foam plastics for water trough for explosion suppression
Technical specification for contrarotating auxiliary fans
Technical specification for extractable Axial-flow fan used for the ground of Small mine
Technical specification for extractable axial-flow used for the ground of small mine
Fundamental pattern and parameter series for extractable axial-flow fan used for the ground of small mine
Determine method of methane adsorption capacity in coal
Determination of calarific value of industrial briquette
Determination of calarific value of industrial briquette
Determination of total sulfur in industrial briquette
Determination of total sulfur in industrial briquette
Determination of compressive strength of industrial briquette after soaking and re-drying
Determination of compressive strength of industrial briquette after soaking and re-drying