4D gas geological research on coal seam with gas hazard potential

gas 4dSpecifications ; Fuel Economy. City 23 mpgHwy 29 mpgComb 25 mpg ; Fuel Type. Gas ; Basic Warranty. 3 years or 36000 miles ; Max Seating. 5 ; Horsepower. 115 @ 5200A 4D gas geological research method is used to find out the anomalous geological area and assess its gas hazard potential. The method covers two ranges of