{HEAD ~ The filter body} is rotatable around {TAIL ~ the axle}, which is permeable to the x ray radiation 
is rotatable around
{ HEAD ~ The filter body } is rotatable around { TAIL ~ the axle } , which is permeable to the x ray radiation
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH