wherein separating recesses are provided between said sealing lands of {TAIL ~ said hydrostatic bearings} and said {HEAD ~ extensions}, 
wherein separating recesses are provided between said sealing lands of { TAIL ~ said hydrostatic bearings } and said { HEAD ~ extensions } ,
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD OTH