... other gases (e.g., biogas, landfill gas, coal mine gas, sewage gas, combustible industrial waste gases ... set developed only for the biomass gas, coal gasifier gas, coke gas,wood gas, syngas, ... producer gas,coal oven gas, coke gas, coking gas, pyrolysis ... gas,lpg, propane, CNG, coal mine gas, mine gas, coal mine methane, coal bed methane, coal bed gas, shale gas, oil shale ...