said second opening having a portion at its outer end connected by {HEAD ~ an annular shoulder} to a small diameter inner bore which is connected by a first by pass conduit to said axial bore and is connected to a second by {TAIL ~ pass conduit}, 
said second opening having a portion at its outer end connected by { HEAD ~ an annular shoulder } to a small diameter inner bore which is connected by a first by pass conduit to said axial bore and is connected to a second by { TAIL ~ pass conduit } ,
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH