The apparatus includes {HEAD ~ a member} having {TAIL ~ a channel} through which fluid flows and at least one opening of a predetermined diameter in communication with the channel 
The apparatus includes { HEAD ~ a member } having { TAIL ~ a channel } through which fluid flows and at least one opening of a predetermined diameter in communication with the channel
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH