F=800 H Fтр=0.2*P=0.2*m*g F=Fтр
P=mg=F/0.2=800/0.2=4000 H
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F=800 H Fтр=0.2*P=0.2*m*g F=Fтр
P=mg=F/0.2=800/0.2=4000 H
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