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APPARATUS FOR FEEDING LIQUID USED TO SPRINKLE A COAL MINER AND SYSTEM FOR CONTROLLING DUSTINESS OF AIR AND METHANE ACCUMULATION WITHIN THE MINING OPERATION AREA FOR SUCH COAL MINER
APPARATUS FOR FEEDING LIQUID USED TO SPRINKLE A COAL MINER AND SYSTEM FOR CONTROLLING DUSTINESS OF AIR AND METHANE ACCUMULATION WITHIN THE MINING OPERATION AREA FOR SUCH COAL MINER