This paper introduces the raw materials, formulation, preparative course and application method about PVA protective film in the range hood of household oil-smoke drawing machine.

The programs will be tailored to the needs of individual countries to help reduce the fall in household income caused-directly and indirectly-by high and volatile oil prices.

Keep paints, used oil, cleaning solvents, pool chemicals, and other dangerous household chemicals out of drains, sinks, and toilets because many of these products contain harmful substances.