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Question:

What does "first effect, medium efficiency, high efficiency air filter" mean?

What does "first effect, medium efficiency, high efficiency air filter" mean?

Answer:

PM2.5 purification efficiency of up to 97%, that is to say, they filter effect is different
medium efficiency filter about PM5 particles, efficient use of HEPA filtration,
First effect filter more than PM10 large particles of dust,

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