Drills liquid libration sieve single, double-decked hook and the board style frame sieve has technological advance, the craft reasonable, bears the acid and alkali, the anti-intercrystalline corrosion anti- high frequency, (satisfies high frequency resonates the 1500-1700r/min request), the service life may achieve 600 hours, the mud conditioning ability strong, the comprehensive cost is low and so on the characteristic. Widely uses in profession each kind of liquid, the powder material and so on petroleum, chemical industry, metallurgy, mine, medicine filters purifies and screens the classification. The drilling mud purifies the equipment in particular the important fitting