单选题
In general, the oil mist defectors include a base plate with air blast pumpThe function of air blast pump is to （）crankcase.
发布日期：2021-03-22
supply clean air to the measuring compartment of the units for more accuracy
generaate the pressure required for the extraction of the oil mist from the
generate the pressure required for the extraction of the oil mist from the crankcase
supply clean air to the measuring track of the units for more accuracy
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