oxygen cylinder are used by miners,deep sea divers,ect .why
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Because oxygen helps the person to survive...
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OXYGEN CYLINDER IS USED BY MOUNTAINEERS,MINERS,SEA DIVER ,ETC. BECAUSE IN ALL THESE PLACES MOUNTAIN,DEEP INSIDE OF LAND AND OCEAN THERE IS LACK OF OXYGEN OR VERY LOW AMOUNT OF OXYGEN IS PRESENT THERE AND DUE TO SUFFOCATION THEY MIGHT DIE SO , THEY USE OXYGEN CYLINDERS.
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