Method for drawing a flow of {TAIL ~ air} and {HEAD ~ particulates} into a vacuum cleaner 
Method for drawing a flow of { TAIL ~ air } and { HEAD ~ particulates } into a vacuum cleaner
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH