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The flats consisted of two small intercommunicating rooms, the outer one opening on to a common hall out of which, on each floor, two bleak corridors with coal-bin, oil-tank, sink, cold-water tap and lavatory (also of the period) served the tenants of the four flats as joint domestic offices

After cleaning, simply rinse the window again with your garden hose and let it air dry

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If youre working in or around coal mines, the organization you work for should put into place methods to decrease the amount of coal mine dust in the area and improve the airflow where youre working